diff --git a/src/kitUI/Cart/calc.ts b/src/kitUI/Cart/calc.ts
index 72c86a0..b9c9767 100644
--- a/src/kitUI/Cart/calc.ts
+++ b/src/kitUI/Cart/calc.ts
@@ -220,7 +220,9 @@ export function findDiscountFactorById(discounts: AnyDiscount[], id: string, pri
     if (!discount) throw new Error("Discount not found by id");
 
     switch (discount.conditionType) {
-        case "cartPurchasesAmount" || "purchasesAmount":
+        case "cartPurchasesAmount":
+            return discount.factor;
+        case "purchasesAmount":
             return discount.factor;
         case "privilege": {
             const product = discount.target.products.find(product => product.privilegeId === privilegeId);
@@ -239,8 +241,6 @@ export function findDiscountFactorById(discounts: AnyDiscount[], id: string, pri
         case "userType":
             return discount.target.factor;
     }
-
-    throw new Error(`Unknown discount condition type: ${discount.conditionType}`);
 }
 
 export function formatDiscountFactor(factor: number): string {