diff --git a/chap5_essential_language_features/essential_csharp_features/Program.cs b/chap5_essential_language_features/essential_csharp_features/Program.cs
index 7da88a6..f9da1e5 100644
--- a/chap5_essential_language_features/essential_csharp_features/Program.cs
+++ b/chap5_essential_language_features/essential_csharp_features/Program.cs
@@ -9,8 +9,8 @@ namespace automatically_implemented_properties
     {
         static void Main(string[] args)
         {
-            // create and populate Shopping Cart
-            ShoppingCart cart = new ShoppingCart
+            // create and populate Shopping Cart, implementing IEnumerable<Product> interface
+            ShoppingCart products = new ShoppingCart
             {
                 Products = new List<Product>
                 {
@@ -20,10 +20,22 @@ namespace automatically_implemented_properties
                     new Product {Name = "Corner flag", Price = 34.95M}
                 }
             };
+            
+            // create and populate an array of Product objects, implementing IEnumerable<Product> interface
+            Product[] productArray =
+            {
+                new Product {Name = "Kayak", Price = 275M},
+                new Product {Name = "Lifejacket", Price = 48.95M},
+                new Product {Name = "Soccer ball", Price = 19.50M},
+                new Product {Name = "Corner flag", Price = 34.95M}
+            };
+            
             // get total value of the products in cart
-            decimal cartTotal = cart.TotalPrices();
+            decimal cartTotal = products.TotalPrices();
+            decimal arrayTotal = productArray.TotalPrices();
             
             Console.WriteLine("Total: {0:c}", cartTotal);
+            Console.WriteLine("Array Total: {0:c}", arrayTotal);
         }
 
     }