fix interest

apps/admin.saladeaula.digital/app/routes/_.$orgid.enrollments.buy/payment.tsx

@@ -85,7 +85,7 @@ export type CreditCard = z.infer<typeof creditCard>
 export function Payment({}) {
   const wizard = useWizard()
   const { update, summary, ...state } = useWizardStore()
-  const { total } = summary()
+  const { subtotal, discount } = summary()
   const { control, handleSubmit } = useForm<Schema>({
     defaultValues: {
       payment_method: state.payment_method,
@@ -156,7 +156,7 @@ export function Payment({}) {
       />
 
       {paymentMethod === 'CREDIT_CARD' ? (
-        <CreditCard control={control} total={total} />
+        <CreditCard control={control} total={subtotal + discount} />
       ) : null}
 
       <Separator />
@@ -367,7 +367,9 @@ export function CreditCard({
                       }
 
                       const value =
-                        calcInterest(total, installment) / installment
+                        installment > 1
+                          ? calcInterest(total, installment) / installment
+                          : total
 
                       return (
                         <NativeSelectOption