Validate a discount against a subtotal, with a SPECIFIC rejection reason (PARITY: "specific discount-rejection reasons" — a shopper is told why, not just "invalid"). Structural only; the app layers active/window/usage.
Validate a discount against a subtotal, with a SPECIFIC rejection reason (PARITY: "specific discount-rejection reasons" — a shopper is told why, not just "invalid"). Structural only; the app layers active/window/usage.