diff --git a/IceCreamShop/IceCreamShopListImplement/Implements/ShopStorage.cs b/IceCreamShop/IceCreamShopListImplement/Implements/ShopStorage.cs
index 06b9cc4..c43b674 100644
--- a/IceCreamShop/IceCreamShopListImplement/Implements/ShopStorage.cs
+++ b/IceCreamShop/IceCreamShopListImplement/Implements/ShopStorage.cs
@@ -108,21 +108,8 @@ namespace IceCreamShopListImplement.Implements
 
         public bool CheckAvailability(int iceCreamId, int count)
         {
-            foreach (var shop in _source.Shops)
-            {
-                foreach (var icecream in shop.ShopIceCreams)
-                {
-                    if (icecream.Value.Item1.Id == iceCreamId)
-                    {
-                        count -= icecream.Value.Item2;
-                    }
-                    if (count <= 0)
-                    {
-                        break;
-                    }
-                }
-            }
-
+            int minus = _source.Shops.Select(x => x.ShopIceCreams.Select(y => (y.Value.Item1.Id == iceCreamId ? y.Value.Item2 : 0)).Sum()).Sum();
+            count -= minus;
             return count <= 0;
         }