diff --git a/services/billing/apis/CalculateTotalPrice.go b/services/billing/apis/CalculateTotalPrice.go
index 6e1758b0..fa5841fe 100644
--- a/services/billing/apis/CalculateTotalPrice.go
+++ b/services/billing/apis/CalculateTotalPrice.go
@@ -214,7 +214,7 @@ type CalculateTotalPriceResponse struct {
 }
 
 type CalculateTotalPriceResult struct {
-    TotalPrice int `json:"totalPrice"`
+    TotalPrice float32 `json:"totalPrice"`
     TotalPriceScale4 int `json:"totalPriceScale4"`
     DiscountedTotalPrice int `json:"discountedTotalPrice"`
     TotalDiscount int `json:"totalDiscount"`