12 files declare their use of Calculator in Commerce Core 8.2

BuyXGetY.php in modules/promotion/src/Plugin/Commerce/PromotionOffer/BuyXGetY.php

BuyXGetYTest.php in modules/promotion/tests/src/Kernel/Plugin/Commerce/PromotionOffer/BuyXGetYTest.php

CalculatorTest.php in modules/price/tests/src/Unit/CalculatorTest.php

CartManager.php in modules/cart/src/CartManager.php

CombinationOffer.php in modules/promotion/src/Plugin/Commerce/PromotionOffer/CombinationOffer.php

OrderItemQuantity.php in modules/promotion/src/Plugin/Commerce/Condition/OrderItemQuantity.php

OrderRefresh.php in modules/order/src/OrderRefresh.php

PercentageOffTrait.php in modules/promotion/src/Plugin/Commerce/PromotionOffer/PercentageOffTrait.php

PriceSplitter.php in modules/order/src/PriceSplitter.php

Promotion.php in modules/promotion/src/Entity/Promotion.php

TaxRatePercentage.php in modules/tax/src/TaxRatePercentage.php

TaxRateResolver.php in modules/tax/tests/modules/commerce_tax_test/src/Resolver/TaxRateResolver.php