<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:a9f07c96-a777-4187-a797-361c825097a8,g:77786ac4-c166-4591-b4a6-2d4e09dc1792-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.atkins.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="atk-20250830.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_150cdfa1-1be3-4560-8ac0-bea2ebfdf00f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_12b7cca5-f4b0-439e-96a0-b9e50e7de313" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_150cdfa1-1be3-4560-8ac0-bea2ebfdf00f" xlink:to="loc_us-gaap_AccountsPayableCurrent_12b7cca5-f4b0-439e-96a0-b9e50e7de313" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_fdd39cda-be95-49b1-8488-27641cdaa252" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_150cdfa1-1be3-4560-8ac0-bea2ebfdf00f" xlink:to="loc_us-gaap_InterestPayableCurrent_fdd39cda-be95-49b1-8488-27641cdaa252" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_5e5b6372-7f6a-46f3-b5b6-11cbacff2bd4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_150cdfa1-1be3-4560-8ac0-bea2ebfdf00f" xlink:to="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_5e5b6372-7f6a-46f3-b5b6-11cbacff2bd4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_4ff9549c-526a-48a1-b89e-c7ff437657c2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_PreferredStockValue_4ff9549c-526a-48a1-b89e-c7ff437657c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_986b6012-d69d-44b0-be19-8f7d27994018" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_CommonStockValue_986b6012-d69d-44b0-be19-8f7d27994018" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_0b90fe33-0e53-40c3-9f4f-249668ba6a1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_TreasuryStockValue_0b90fe33-0e53-40c3-9f4f-249668ba6a1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_e17af416-cf90-4535-8384-3efefc8554b7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_AdditionalPaidInCapital_e17af416-cf90-4535-8384-3efefc8554b7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_25dd425b-876d-4dc2-b9c7-a043dbfb20fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_25dd425b-876d-4dc2-b9c7-a043dbfb20fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fbe4a8ca-e3ea-48ed-b2ae-93a3f88647c1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_fc2521db-255b-47d4-987e-d1f2f650ddd4" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fbe4a8ca-e3ea-48ed-b2ae-93a3f88647c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_05503a06-d751-460c-bcc3-537cd24a29f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_849515c3-f47d-4687-a131-3686f8bc757f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_05503a06-d751-460c-bcc3-537cd24a29f7" xlink:to="loc_us-gaap_Liabilities_849515c3-f47d-4687-a131-3686f8bc757f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_df106452-c8e2-49cc-8e59-c0966869029a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_05503a06-d751-460c-bcc3-537cd24a29f7" xlink:to="loc_us-gaap_StockholdersEquity_df106452-c8e2-49cc-8e59-c0966869029a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_a5f3ae39-61cb-4d49-b76d-b4d8ee7ff4a9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_a5f3ae39-61cb-4d49-b76d-b4d8ee7ff4a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_e0c0fd36-a61a-4e05-8513-ff99c9e03c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:to="loc_us-gaap_AssetsCurrent_e0c0fd36-a61a-4e05-8513-ff99c9e03c9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_636e7482-6720-4c8c-a620-bba07bc1d9e1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_636e7482-6720-4c8c-a620-bba07bc1d9e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_36d3fe4a-eed5-4112-b8c6-db6fb79ba13a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:to="loc_us-gaap_Goodwill_36d3fe4a-eed5-4112-b8c6-db6fb79ba13a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_cda67eee-2cfe-4441-bf6b-b2b4e559a527" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_f6ffb213-fb70-4845-9275-275e3a92ccb2" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_cda67eee-2cfe-4441-bf6b-b2b4e559a527" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_d1c0c4a8-2ce2-4639-aca4-10f845aa8e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_d1c0c4a8-2ce2-4639-aca4-10f845aa8e9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_3aee55df-6f48-47bd-b5a9-5527e79afdcf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_3aee55df-6f48-47bd-b5a9-5527e79afdcf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_f5edc92c-4cde-432e-98ff-21a5af7866fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:to="loc_us-gaap_InventoryNet_f5edc92c-4cde-432e-98ff-21a5af7866fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_508efad9-8211-444a-bfa3-0f33ddd429d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_508efad9-8211-444a-bfa3-0f33ddd429d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_de7cd879-8106-4475-bb21-ea97545964ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_6f403774-4fda-4e82-bfa0-01a772f386db" xlink:to="loc_us-gaap_OtherAssetsCurrent_de7cd879-8106-4475-bb21-ea97545964ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_67301abd-375f-483b-bc1d-562753862377" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_a2043682-d5e7-42b3-85d8-44a5e874582d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_67301abd-375f-483b-bc1d-562753862377" xlink:to="loc_us-gaap_LiabilitiesCurrent_a2043682-d5e7-42b3-85d8-44a5e874582d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_c6199227-90ff-48b5-8dab-e3441a379614" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_67301abd-375f-483b-bc1d-562753862377" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_c6199227-90ff-48b5-8dab-e3441a379614" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_bcb56854-1062-4b35-a18e-371d2e76ce2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_67301abd-375f-483b-bc1d-562753862377" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_bcb56854-1062-4b35-a18e-371d2e76ce2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_28a33692-e03b-4c42-ab2b-74b45fae55d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_67301abd-375f-483b-bc1d-562753862377" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_28a33692-e03b-4c42-ab2b-74b45fae55d6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncome" xlink:type="simple" xlink:href="atk-20250830.xsd#ConsolidatedStatementsofOperationsandComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_29045ba3-d5ce-429a-beb0-b6d5d23e58d4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5ff82162-0888-44e7-b1ba-5ca6bba2cdc6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_29045ba3-d5ce-429a-beb0-b6d5d23e58d4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5ff82162-0888-44e7-b1ba-5ca6bba2cdc6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_08dbf2f8-2ac9-4c4b-877f-0ecd99af5098" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_29045ba3-d5ce-429a-beb0-b6d5d23e58d4" xlink:to="loc_us-gaap_CostOfRevenue_08dbf2f8-2ac9-4c4b-877f-0ecd99af5098" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_39300afc-8604-4a03-a24e-9622ec3351b0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c9a2721e-d3eb-4093-b8cc-c594adbbe9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_39300afc-8604-4a03-a24e-9622ec3351b0" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c9a2721e-d3eb-4093-b8cc-c594adbbe9b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ed3631c7-1376-4ba5-b3d8-dca35b3a3866" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_39300afc-8604-4a03-a24e-9622ec3351b0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_ed3631c7-1376-4ba5-b3d8-dca35b3a3866" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_d75edb72-c1ea-4eec-8277-2bc4fd3a629f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:to="loc_us-gaap_SellingAndMarketingExpense_d75edb72-c1ea-4eec-8277-2bc4fd3a629f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_28006ecd-0d47-4b25-a573-396e7e16a406" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_28006ecd-0d47-4b25-a573-396e7e16a406" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationNonproduction_d4fe5ccf-bd03-4938-86c9-9e814415e783" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationNonproduction"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:to="loc_us-gaap_DepreciationNonproduction_d4fe5ccf-bd03-4938-86c9-9e814415e783" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_f97dd2e6-392a-4514-973a-d632bfa6d859" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_f97dd2e6-392a-4514-973a-d632bfa6d859" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_2aa5af40-082a-4f85-a7b4-b258205b44dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_d3c4406e-c0f8-4401-b346-c77373bbeb2f" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_2aa5af40-082a-4f85-a7b4-b258205b44dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_7421beee-d114-4021-8467-7c32e75ac9a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_bb5bcbe7-ce47-4d8c-a18e-be1cb48c2702" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_7421beee-d114-4021-8467-7c32e75ac9a5" xlink:to="loc_us-gaap_NetIncomeLoss_bb5bcbe7-ce47-4d8c-a18e-be1cb48c2702" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_14279f46-1ecf-47fd-a81a-0603bacbda8a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_7421beee-d114-4021-8467-7c32e75ac9a5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_14279f46-1ecf-47fd-a81a-0603bacbda8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_712ab50b-9635-4007-b2c0-52f69f63a756" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_03a3fa8f-f846-4ebe-a831-d492d78b537e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_712ab50b-9635-4007-b2c0-52f69f63a756" xlink:to="loc_us-gaap_GrossProfit_03a3fa8f-f846-4ebe-a831-d492d78b537e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_2ab8c451-17d3-44d6-807d-a511cc3dd7a4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_712ab50b-9635-4007-b2c0-52f69f63a756" xlink:to="loc_us-gaap_OperatingExpenses_2ab8c451-17d3-44d6-807d-a511cc3dd7a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_5807a234-e56a-4bc4-8ff4-4f7fefa9fd1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_bbdfe124-d59b-46ae-a49d-53f449f615e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestIncomeOther"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5807a234-e56a-4bc4-8ff4-4f7fefa9fd1b" xlink:to="loc_us-gaap_InterestIncomeOther_bbdfe124-d59b-46ae-a49d-53f449f615e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_0d91e011-1115-4ded-8ced-74491b1d6ea0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5807a234-e56a-4bc4-8ff4-4f7fefa9fd1b" xlink:to="loc_us-gaap_InterestExpenseNonoperating_0d91e011-1115-4ded-8ced-74491b1d6ea0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_1a6aa5c5-b10a-43ed-b405-dfc2ab304427" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5807a234-e56a-4bc4-8ff4-4f7fefa9fd1b" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_1a6aa5c5-b10a-43ed-b405-dfc2ab304427" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_6976ea05-6ecb-47e6-a67c-52b4ca80d906" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5807a234-e56a-4bc4-8ff4-4f7fefa9fd1b" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_6976ea05-6ecb-47e6-a67c-52b4ca80d906" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="atk-20250830.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_abdf4a5d-895b-40e3-b059-59e0b307b7bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_3a22c3d3-130c-437b-a459-9bf0bb58b33c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_abdf4a5d-895b-40e3-b059-59e0b307b7bc" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_3a22c3d3-130c-437b-a459-9bf0bb58b33c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_IssuanceOfNoteReceivable_4ecd58e0-199d-4281-b1b4-170a3a382e5c" xlink:href="atk-20250830.xsd#atk_IssuanceOfNoteReceivable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_abdf4a5d-895b-40e3-b059-59e0b307b7bc" xlink:to="loc_atk_IssuanceOfNoteReceivable_4ecd58e0-199d-4281-b1b4-170a3a382e5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_cccffae0-2297-44ea-a394-8efdedf7983b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_abdf4a5d-895b-40e3-b059-59e0b307b7bc" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_cccffae0-2297-44ea-a394-8efdedf7983b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_40984a43-3524-49d6-bc58-d844b19fffe1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_abdf4a5d-895b-40e3-b059-59e0b307b7bc" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_40984a43-3524-49d6-bc58-d844b19fffe1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_2276b86c-cc8c-4ae0-9e7f-716e1f9d5867" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_128b72d3-1522-436c-9a58-4bd338befdcb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_2276b86c-cc8c-4ae0-9e7f-716e1f9d5867" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_128b72d3-1522-436c-9a58-4bd338befdcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_08043fb8-5287-4db9-99dd-61794acf6894" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_2276b86c-cc8c-4ae0-9e7f-716e1f9d5867" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_08043fb8-5287-4db9-99dd-61794acf6894" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_31ec17cf-ed8e-42dc-b5a1-b337d113fea7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_2276b86c-cc8c-4ae0-9e7f-716e1f9d5867" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_31ec17cf-ed8e-42dc-b5a1-b337d113fea7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0229d94d-eae7-484f-adaf-0601ebaeebc0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_NetIncomeLoss_0229d94d-eae7-484f-adaf-0601ebaeebc0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_48944b71-97c5-44fa-82a0-fa64f0638153" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_48944b71-97c5-44fa-82a0-fa64f0638153" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_6c8b348b-1cdc-4fdc-9df0-b817bd0e2054" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_6c8b348b-1cdc-4fdc-9df0-b817bd0e2054" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_72db83e8-7860-4b4a-bf5b-762f617dc74c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_ShareBasedCompensation_72db83e8-7860-4b4a-bf5b-762f617dc74c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_4e951f8e-a3ae-42b8-9752-213785941ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_4e951f8e-a3ae-42b8-9752-213785941ea9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerReceivableCreditLossExpenseReversal_4292b767-ef9a-4a15-90c1-12a567906e08" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerReceivableCreditLossExpenseReversal"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_ContractWithCustomerReceivableCreditLossExpenseReversal_4292b767-ef9a-4a15-90c1-12a567906e08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_93d5dc53-e6b2-43cb-b0c2-ea09af70dc9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_93d5dc53-e6b2-43cb-b0c2-ea09af70dc9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e1e681fb-6454-4a27-a9b4-776ddf994d17" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e1e681fb-6454-4a27-a9b4-776ddf994d17" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f1e3a9d2-7652-4e95-9bef-730eda455e8a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_f1e3a9d2-7652-4e95-9bef-730eda455e8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_2f19cb06-ab51-4ca7-91ca-7499e9869d22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_2f19cb06-ab51-4ca7-91ca-7499e9869d22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_21ecf40c-67ca-40f0-8921-7b52460f5aab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_21ecf40c-67ca-40f0-8921-7b52460f5aab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_17fbb89d-66a8-47d6-b32f-8043c11de431" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_17fbb89d-66a8-47d6-b32f-8043c11de431" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_f105e959-c85b-4ecb-a530-d9959c8f056d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_f105e959-c85b-4ecb-a530-d9959c8f056d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_0c1ed492-1394-474d-9afb-b88625fdc1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_0c1ed492-1394-474d-9afb-b88625fdc1d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_7cc33364-5585-45b9-ad09-6dcf1153c757" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_7cc33364-5585-45b9-ad09-6dcf1153c757" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_42f352c0-49c8-437f-af6e-4f6da696ee9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_42f352c0-49c8-437f-af6e-4f6da696ee9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_7a263854-9a8c-4487-a2b9-eae97aa4f67b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_7a263854-9a8c-4487-a2b9-eae97aa4f67b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_b031d274-a3e4-4ac8-a1b8-7bed96237d22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cfcf79ec-2546-4d85-8866-86248bdf578e" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_b031d274-a3e4-4ac8-a1b8-7bed96237d22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_76e699e3-6dc9-4a63-9af5-309648d334e9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_76e699e3-6dc9-4a63-9af5-309648d334e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_db3cdfd9-5c66-4272-a8ee-bb3ffdb1b1f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_db3cdfd9-5c66-4272-a8ee-bb3ffdb1b1f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_72cc60c0-1561-4b77-9c9d-91c6d07b3374" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_72cc60c0-1561-4b77-9c9d-91c6d07b3374" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_568864b7-b471-4d1c-99fd-0141d60fb54c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_568864b7-b471-4d1c-99fd-0141d60fb54c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_dc0fdf3f-bb0a-41d2-9bf6-10ebc1e4fe19" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_dc0fdf3f-bb0a-41d2-9bf6-10ebc1e4fe19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_b073c311-bb1d-4477-8890-b52cc6ca63c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_b073c311-bb1d-4477-8890-b52cc6ca63c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromOtherDebt_6c8b0562-4791-471f-8982-ce48ef78d3c8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromOtherDebt"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_ProceedsFromOtherDebt_6c8b0562-4791-471f-8982-ce48ef78d3c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_fdb14606-c3c0-40c9-b914-a75569c9c9a2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d64c14c3-e696-4970-b845-5e7e1c2cda7f" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_fdb14606-c3c0-40c9-b914-a75569c9c9a2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/BusinessCombinationDetails2" xlink:type="simple" xlink:href="atk-20250830.xsd#BusinessCombinationDetails2"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/BusinessCombinationDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_2ab27378-2280-4828-88e8-45e828f15d86" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_0b3d33fd-fb5c-494d-a4d5-c8df2b4f6492" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_2ab27378-2280-4828-88e8-45e828f15d86" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_0b3d33fd-fb5c-494d-a4d5-c8df2b4f6492" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_35b07297-a4be-4cae-936d-14eb35b14b6a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_2ab27378-2280-4828-88e8-45e828f15d86" xlink:to="loc_us-gaap_Goodwill_35b07297-a4be-4cae-936d-14eb35b14b6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_61bf7d1d-2b7f-4a08-837f-026b60c2fca5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_61bf7d1d-2b7f-4a08-837f-026b60c2fca5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_a629897b-af1d-4897-aa5b-b649bdc28f83" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_a629897b-af1d-4897-aa5b-b649bdc28f83" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_c947156b-c2ef-4857-b306-6d24a3260f6a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_c947156b-c2ef-4857-b306-6d24a3260f6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_bba38f4a-de14-4d16-8489-607f4ca80b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_bba38f4a-de14-4d16-8489-607f4ca80b6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_1d487937-bf6a-404e-a8b9-107d7fde0146" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_1d487937-bf6a-404e-a8b9-107d7fde0146" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_9998822d-0961-44d0-9257-f5e09ddc2f97" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_9998822d-0961-44d0-9257-f5e09ddc2f97" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_25e15116-4483-469b-9d0f-4ce8e1a14112" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_25e15116-4483-469b-9d0f-4ce8e1a14112" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_32d327b6-6fb1-496b-8dbf-e2a7bd28d898" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_32d327b6-6fb1-496b-8dbf-e2a7bd28d898" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_a2a8489b-0827-4f08-9ceb-926a21733038" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_a2a8489b-0827-4f08-9ceb-926a21733038" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_1835b1f9-9fd6-46fa-8e80-bc5d428e7d71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_1835b1f9-9fd6-46fa-8e80-bc5d428e7d71" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_cb30fed4-76cb-4951-a2ac-37ee8611d85c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_cb30fed4-76cb-4951-a2ac-37ee8611d85c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_de9718e9-f7ae-445e-8e61-4c8a3b90840e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02e33f49-ebff-4012-98a9-6df650292c48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_de9718e9-f7ae-445e-8e61-4c8a3b90840e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/PropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#PropertyandEquipmentNetDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/PropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_9067f079-f18f-4262-ba91-d99598290c16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_7af17368-fa35-40aa-bfe1-2ccc82d50d1c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_9067f079-f18f-4262-ba91-d99598290c16" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_7af17368-fa35-40aa-bfe1-2ccc82d50d1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_71514e1f-fc8f-4e1e-be20-c8707fcf7a47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_9067f079-f18f-4262-ba91-d99598290c16" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_71514e1f-fc8f-4e1e-be20-c8707fcf7a47" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/GoodwillandIntangiblesScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#GoodwillandIntangiblesScheduleofIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/GoodwillandIntangiblesScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_d374f3ae-d0fc-451a-b19a-823af4f7af3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_d374f3ae-d0fc-451a-b19a-823af4f7af3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_8d650fbe-5ceb-496a-8cb5-6ac621de7151" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_8d650fbe-5ceb-496a-8cb5-6ac621de7151" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_37374ef5-4315-4a5d-b5d5-810acd37c0bf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_37374ef5-4315-4a5d-b5d5-810acd37c0bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_0bb4d699-cd38-493b-9446-d5f72ba35231" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_0bb4d699-cd38-493b-9446-d5f72ba35231" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_24c38f03-9df4-4169-ac7e-f72c3f8317b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_24c38f03-9df4-4169-ac7e-f72c3f8317b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_127f572d-1e8c-4657-8daf-8464cd46fce6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4fed2c90-676c-4b40-9dd5-2798ec3b1f72" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_127f572d-1e8c-4657-8daf-8464cd46fce6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_a21fc685-894b-4969-a054-06a7465ec8a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_68bf6e1a-d902-47e3-b0dc-01274fb42023" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_a21fc685-894b-4969-a054-06a7465ec8a0" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_68bf6e1a-d902-47e3-b0dc-01274fb42023" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_de8ac45d-13dd-4dbe-bb5b-0f1c93949972" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_a21fc685-894b-4969-a054-06a7465ec8a0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_de8ac45d-13dd-4dbe-bb5b-0f1c93949972" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c89cd467-1698-4a68-b85e-3ae7d2c78776" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_35800a2d-1ff3-447e-a87e-faf5134c765a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c89cd467-1698-4a68-b85e-3ae7d2c78776" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_35800a2d-1ff3-447e-a87e-faf5134c765a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_88f9538b-5efa-4f9b-827f-ce3453344788" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c89cd467-1698-4a68-b85e-3ae7d2c78776" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_88f9538b-5efa-4f9b-827f-ce3453344788" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/AccruedExpensesandOtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#AccruedExpensesandOtherCurrentLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/AccruedExpensesandOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_ae435467-2f21-43d8-a8c8-f1b6a7f7c3af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedProfessionalFeesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_ae435467-2f21-43d8-a8c8-f1b6a7f7c3af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedAdvertisingCurrent_091e1bf7-fc75-40a2-b4f6-c2da949013b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedAdvertisingCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedAdvertisingCurrent_091e1bf7-fc75-40a2-b4f6-c2da949013b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedBonusesCurrent_3c2738d4-fbd8-45e5-a211-41b0c07174f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedBonusesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedBonusesCurrent_3c2738d4-fbd8-45e5-a211-41b0c07174f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_FreightAccrualCurrent_77911631-a712-42e1-a1c2-5d9d83b80645" xlink:href="atk-20250830.xsd#atk_FreightAccrualCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_atk_FreightAccrualCurrent_77911631-a712-42e1-a1c2-5d9d83b80645" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrent_a690e97c-1d6b-44c3-a71d-f69807d6dd89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedSalariesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedSalariesCurrent_a690e97c-1d6b-44c3-a71d-f69807d6dd89" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalesCommissionCurrent_5691fede-c494-4566-8017-1234fdccad90" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedSalesCommissionCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedSalesCommissionCurrent_5691fede-c494-4566-8017-1234fdccad90" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_b2e73dd9-6024-447c-a02b-b6175d109dba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_b2e73dd9-6024-447c-a02b-b6175d109dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_04a7279e-587c-4798-8ffe-04484a57c6da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesAndExciseTaxPayableCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_04a7279e-587c-4798-8ffe-04484a57c6da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_cc38c069-45cb-4814-8d85-df00fe313706" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_cc38c069-45cb-4814-8d85-df00fe313706" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_AccruedRDExpenses_8a2556f4-4ba2-4ccb-a06b-303a60473b6a" xlink:href="atk-20250830.xsd#atk_AccruedRDExpenses"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_atk_AccruedRDExpenses_8a2556f4-4ba2-4ccb-a06b-303a60473b6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_1c773d93-811f-4f57-a753-4d5f8708a8d3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_2268db12-e668-4bf0-ba9c-4564bc7d5489" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_1c773d93-811f-4f57-a753-4d5f8708a8d3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/LongTermDebtandLineofCreditScheduleofDebtDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#LongTermDebtandLineofCreditScheduleofDebtDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/LongTermDebtandLineofCreditScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_0740520e-3107-4b5b-a0f0-3dd68448f39b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_0740520e-3107-4b5b-a0f0-3dd68448f39b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_722a9602-5217-4fd9-bd13-e033929296ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_722a9602-5217-4fd9-bd13-e033929296ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_79a9938f-59d2-47bd-9641-fbdf957f1701" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_79a9938f-59d2-47bd-9641-fbdf957f1701" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_3cfd6403-e7c7-4664-9764-1fe6d7643c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_3cfd6403-e7c7-4664-9764-1fe6d7643c6f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_481521e8-48e2-4955-a31b-46cc3c21ce6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_0c15c5ba-2b88-4aa5-9955-178a02f893f9" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_481521e8-48e2-4955-a31b-46cc3c21ce6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_62993b29-28fd-42bf-a736-fe8e46a291ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_01837040-62a5-4b2e-9c4e-84b0b9ba60f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCredit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_62993b29-28fd-42bf-a736-fe8e46a291ff" xlink:to="loc_us-gaap_LineOfCredit_01837040-62a5-4b2e-9c4e-84b0b9ba60f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_09ecb831-25aa-4504-84c0-9269789f23bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_62993b29-28fd-42bf-a736-fe8e46a291ff" xlink:to="loc_us-gaap_FinanceLeaseLiability_09ecb831-25aa-4504-84c0-9269789f23bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_a3620e78-2793-4eb0-b767-4a1564246ec5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_62993b29-28fd-42bf-a736-fe8e46a291ff" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_a3620e78-2793-4eb0-b767-4a1564246ec5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/IncomeTaxesComponentsofIncomeTaxDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#IncomeTaxesComponentsofIncomeTaxDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/IncomeTaxesComponentsofIncomeTaxDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ee3182d1-9435-42c0-8bb1-f30dce58f30e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d49dd159-21ba-41f4-a2a4-3d7071a8ea1e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_ee3182d1-9435-42c0-8bb1-f30dce58f30e" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d49dd159-21ba-41f4-a2a4-3d7071a8ea1e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_cb6eeee8-f475-48c6-9ea9-7e8a52686d56" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_ee3182d1-9435-42c0-8bb1-f30dce58f30e" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_cb6eeee8-f475-48c6-9ea9-7e8a52686d56" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_3d9d81c2-e342-4e79-b16a-27635902d868" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_5a71f740-a30d-45c3-ab8b-0b0f05ac90c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_3d9d81c2-e342-4e79-b16a-27635902d868" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_5a71f740-a30d-45c3-ab8b-0b0f05ac90c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_56fe34ff-2e97-422c-bf06-7232d15a9921" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_3d9d81c2-e342-4e79-b16a-27635902d868" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_56fe34ff-2e97-422c-bf06-7232d15a9921" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_25ba60fd-25ba-45ac-b790-fa6817332e7b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_3d9d81c2-e342-4e79-b16a-27635902d868" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_25ba60fd-25ba-45ac-b790-fa6817332e7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_738cf5b1-c68d-48c9-991e-c343d93e4256" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_9d8a13a1-e75f-4d30-aa7c-df914a3af85a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_738cf5b1-c68d-48c9-991e-c343d93e4256" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_9d8a13a1-e75f-4d30-aa7c-df914a3af85a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_edbd4458-e8c6-4322-b2b8-4691c36e6084" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_738cf5b1-c68d-48c9-991e-c343d93e4256" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_edbd4458-e8c6-4322-b2b8-4691c36e6084" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_50ffc124-b2fb-40d0-8154-5272fb37fb33" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_738cf5b1-c68d-48c9-991e-c343d93e4256" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_50ffc124-b2fb-40d0-8154-5272fb37fb33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostsPercent_57260b92-c2ad-4bc3-a846-c81d1e719710" xlink:href="atk-20250830.xsd#atk_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostsPercent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_atk_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostsPercent_57260b92-c2ad-4bc3-a846-c81d1e719710" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_6e2b04d8-79ba-406e-a3b4-a552b621ceb9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_6e2b04d8-79ba-406e-a3b4-a552b621ceb9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c0a1fd24-b467-4b47-802c-ddb00083a6fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c0a1fd24-b467-4b47-802c-ddb00083a6fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_ChangeInStateTaxRate_ca5f325b-be38-443c-b2b1-38f30d881ed3" xlink:href="atk-20250830.xsd#atk_ChangeInStateTaxRate"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_atk_ChangeInStateTaxRate_ca5f325b-be38-443c-b2b1-38f30d881ed3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_de01a5f5-a2a5-46b6-834e-415f39eee885" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_de01a5f5-a2a5-46b6-834e-415f39eee885" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_9672cd6e-3c4a-470b-9017-39e1deee977f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_9672cd6e-3c4a-470b-9017-39e1deee977f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_c8d7bc19-1159-415b-8600-48c5375881c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c4e7b46f-5083-42e7-b6b1-531449cd3802" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_c8d7bc19-1159-415b-8600-48c5375881c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2e3b83a1-56e9-47b1-b3b8-0a8c339c4774" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_ea3c1d8d-3b03-4fc4-801b-65f9b9be19a3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2e3b83a1-56e9-47b1-b3b8-0a8c339c4774" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_ea3c1d8d-3b03-4fc4-801b-65f9b9be19a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_c5dfca47-cb7b-4a3f-aa26-e185bd0eb3e4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2e3b83a1-56e9-47b1-b3b8-0a8c339c4774" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_c5dfca47-cb7b-4a3f-aa26-e185bd0eb3e4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilities_b1310390-14c6-47d5-a061-5c831f08f7cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_75d456fc-16e2-49d9-a54d-4560906e62fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_b1310390-14c6-47d5-a061-5c831f08f7cf" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_75d456fc-16e2-49d9-a54d-4560906e62fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_90019080-c4eb-42a6-b0c6-be0da16b310d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_b1310390-14c6-47d5-a061-5c831f08f7cf" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_90019080-c4eb-42a6-b0c6-be0da16b310d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_e95083c4-7a65-417a-8473-ac9a22bdcf54" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_e95083c4-7a65-417a-8473-ac9a22bdcf54" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_171ffd38-d93b-4ddf-95c9-8c7f77361cbc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_171ffd38-d93b-4ddf-95c9-8c7f77361cbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_a79f935e-7b2d-496a-ba83-b9e8de8290cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_a79f935e-7b2d-496a-ba83-b9e8de8290cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_7113148e-1481-4f1a-b5ae-f07af787cdbe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_7113148e-1481-4f1a-b5ae-f07af787cdbe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_DeferredTaxAssetsLeaseLiabilities_6f99a140-a6cd-4c88-bd2b-3523aed1efc6" xlink:href="atk-20250830.xsd#atk_DeferredTaxAssetsLeaseLiabilities"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_atk_DeferredTaxAssetsLeaseLiabilities_6f99a140-a6cd-4c88-bd2b-3523aed1efc6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_bda1c530-bd5e-4646-9482-82a3e135dafb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_bda1c530-bd5e-4646-9482-82a3e135dafb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInventory_946adc8c-bf9f-476d-95e9-4e58ceb52dc6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsInventory"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsInventory_946adc8c-bf9f-476d-95e9-4e58ceb52dc6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInvestments_3e53bb54-0bcd-410a-ba35-1d430e25fbdd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsInvestments"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsInvestments_3e53bb54-0bcd-410a-ba35-1d430e25fbdd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_FederalBenefitOfStateTaxes_8d02147d-39ed-4e64-be73-375bc031ca6c" xlink:href="atk-20250830.xsd#atk_FederalBenefitOfStateTaxes"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_atk_FederalBenefitOfStateTaxes_8d02147d-39ed-4e64-be73-375bc031ca6c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_ba2c3b87-65bc-4aba-b506-24b7a05037f4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_6e7172c5-1016-4ea5-9857-3091d803a2ce" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_ba2c3b87-65bc-4aba-b506-24b7a05037f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_bb030b2e-6760-4c8f-9599-10f562d93e03" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_0cd5b73a-fcd2-4d91-ae64-57ae9a4bfd3d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_bb030b2e-6760-4c8f-9599-10f562d93e03" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_0cd5b73a-fcd2-4d91-ae64-57ae9a4bfd3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_764d8e70-e428-4aba-83b7-a24c48a718d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_bb030b2e-6760-4c8f-9599-10f562d93e03" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_764d8e70-e428-4aba-83b7-a24c48a718d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_d8bdc603-f983-4a10-aa3d-19e0c234dd66" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_30aa2a81-dc44-4ed6-9976-0f483b0875f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d8bdc603-f983-4a10-aa3d-19e0c234dd66" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_30aa2a81-dc44-4ed6-9976-0f483b0875f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_ac25d572-3bec-49d9-811c-42bf25903381" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d8bdc603-f983-4a10-aa3d-19e0c234dd66" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_ac25d572-3bec-49d9-811c-42bf25903381" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_2e2cee59-08bc-4162-af8b-1cede44158a3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d8bdc603-f983-4a10-aa3d-19e0c234dd66" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_2e2cee59-08bc-4162-af8b-1cede44158a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_6a365c70-9242-4c26-91ac-a93e41a7fdee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d8bdc603-f983-4a10-aa3d-19e0c234dd66" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_6a365c70-9242-4c26-91ac-a93e41a7fdee" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/LeasesDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#LeasesDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/LeasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_atk_TotalOperatingLeaseCost_e5fab811-39c2-43ea-838a-bebf666cc820" xlink:href="atk-20250830.xsd#atk_TotalOperatingLeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_a6479dd8-f4ad-4655-88e9-69a83f002237" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_atk_TotalOperatingLeaseCost_e5fab811-39c2-43ea-838a-bebf666cc820" xlink:to="loc_us-gaap_VariableLeaseCost_a6479dd8-f4ad-4655-88e9-69a83f002237" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_d672c68a-e157-47c1-9237-6a9eaffa3263" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_atk_TotalOperatingLeaseCost_e5fab811-39c2-43ea-838a-bebf666cc820" xlink:to="loc_us-gaap_OperatingLeaseCost_d672c68a-e157-47c1-9237-6a9eaffa3263" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_10bba8ac-fbd0-4cd9-8f30-b5c2b7db4be4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_TotalOperatingLeaseCost_178aa1e8-4009-431c-b17a-51d58b32363a" xlink:href="atk-20250830.xsd#atk_TotalOperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_10bba8ac-fbd0-4cd9-8f30-b5c2b7db4be4" xlink:to="loc_atk_TotalOperatingLeaseCost_178aa1e8-4009-431c-b17a-51d58b32363a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_fb010a0a-535f-4db3-981e-b20acf8f22fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_fb010a0a-535f-4db3-981e-b20acf8f22fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_26176713-dbf5-473d-8757-4fd6dd186d2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_26176713-dbf5-473d-8757-4fd6dd186d2f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_f1c12c5c-31a2-4791-a7df-f5d874ee0f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_f1c12c5c-31a2-4791-a7df-f5d874ee0f4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_26f2a566-51bb-456d-8828-ffa90d0a1448" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_26f2a566-51bb-456d-8828-ffa90d0a1448" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_ba91b134-afa2-4c64-ae14-04d5e3f90879" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_ba91b134-afa2-4c64-ae14-04d5e3f90879" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_7a72f946-f33b-4a65-a023-65ebfb7dd7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_f374c41c-ead3-4c54-b81f-2b124f3e99f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_7a72f946-f33b-4a65-a023-65ebfb7dd7b7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.atkins.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="atk-20250830.xsd#EarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.atkins.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1aef4bd2-c959-484e-af38-71481195a7c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4f5c1bad-8efb-4fed-bccc-542c59272a2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1aef4bd2-c959-484e-af38-71481195a7c6" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4f5c1bad-8efb-4fed-bccc-542c59272a2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_atk_IncrementalCommonSharesAttributabletoDilutiveEffectofStockOptions_b15a652d-1a03-4814-b332-9e7379016147" xlink:href="atk-20250830.xsd#atk_IncrementalCommonSharesAttributabletoDilutiveEffectofStockOptions"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1aef4bd2-c959-484e-af38-71481195a7c6" xlink:to="loc_atk_IncrementalCommonSharesAttributabletoDilutiveEffectofStockOptions_b15a652d-1a03-4814-b332-9e7379016147" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_db5b185c-d1b0-4af2-b48a-feba280b2f7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1aef4bd2-c959-484e-af38-71481195a7c6" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_db5b185c-d1b0-4af2-b48a-feba280b2f7f" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
