diff --git a/src/main/java/org/example/Order.java b/src/main/java/org/example/Order.java
index 814b3fb..f36d11b 100644
--- a/src/main/java/org/example/Order.java
+++ b/src/main/java/org/example/Order.java
@@ -34,7 +34,7 @@ public class Order {
         List<Product> highVatProducts = filterHighVatProducts(products);
         float lowVatPortion = getPrice(lowVatProducts) / totalPrice;
         float highVatPortion = getPrice(highVatProducts) / totalPrice;
-        return baseShippingCost * lowVatPortion / (1 + Constants.lowVat) + baseShippingCost * highVatPortion / (1 + Constants.highVat);
+        return baseShippingCost - (baseShippingCost * lowVatPortion / (1 + Constants.lowVat) + baseShippingCost * highVatPortion / (1 + Constants.highVat));
     }
 
     public float calculateShippingCost(List<Product> products) {