fix

virgo.api/src/main/java/com/bosshand/virgo/api/workark/service/OrderInfoService.java

@@ -198,13 +198,16 @@ public class OrderInfoService {
         Product product = productDao.get(productId);
         BigDecimal price = product.getPrice();
 
+        BigDecimal lastPrice = price;
+
         // 优惠券
         if (productCouponList.size() > 0) {
             for (ProductCoupon productCoupon : productCouponList) {
-                price = price.subtract(calculatePriceSingle(price, productCoupon));
+                BigDecimal bigDecimal = calculatePriceSingle(price, productCoupon);
+                lastPrice = lastPrice.subtract(bigDecimal);
             }
         }
-        return price;
+        return lastPrice;
     }
 
     /**