An order item is a single line item of an order that registers the bill for a product
DEPRECATED: Please use `itemDiscountWithOrderDiscountCents`
DEPRECATED: Please sum all `*DiscountCents` instead
DEPRECATED: Please use `itemDiscountWithoutOrderDiscountCents`
DEPRECATED: Please sum `planDiscountCents` and `memberDiscountCents`
DEPRECATED: Please use `subtotalCents`
DEPRECATED: Please sum all `*TaxCents`
DEPRECATED: Please use `totalBeforeTaxCents`