Fix discount in billing UI (#497)

* Fix discount in billing UI

* Remove npm test workflow for now

Author: reichert621

assets/src/components/billing/support.test.ts

@@ -202,12 +202,12 @@ describe('calculateSubscriptionDiscount', () => {
       discount: {
         duration: 'forever',
         name: 'Early Adopter',
-        percent_off: 50,
+        percent_off: 40,
         valid: true,
       },
     });
 
-    expect(calculateSubscriptionDiscount(subscription)).toEqual(2000);
+    expect(calculateSubscriptionDiscount(subscription)).toEqual(1600);
   });
 
   test('handles amount_off discounts', () => {
@@ -230,6 +230,6 @@ describe('calculateSubscriptionDiscount', () => {
       },
     });
 
-    expect(calculateSubscriptionDiscount(subscription)).toEqual(3000);
+    expect(calculateSubscriptionDiscount(subscription)).toEqual(1000);
   });
 });

assets/src/components/billing/support.ts

@@ -198,7 +198,7 @@ export const calculateSubscriptionDiscount = (
   }
 
   if (amountOff) {
-    return total - amountOff;
+    return amountOff;
   } else if (percentOff) {
     return total * (percentOff / 100);
   } else {