public static void OrderSummary(Pizza pizza, Pasta pasta)
        {
            Console.WriteLine("|\n \t\t Your order summary");
            Console.WriteLine("|---------------------------------------------------------------|");
            Console.WriteLine("| Item name \t\t\t Quantity \t Price \t Total  |");
            Console.WriteLine("|---------------------------------------------------------------|");
            if (pizza != null && pasta != null)
            {
                pizza.Display();
                pasta.Display();
                Console.WriteLine("|---------------------------------------------------------------|");
                Console.WriteLine("|\t\t\t\t\t\t Total = {0} AUD |", (pizza.totalAmount + pasta.totalAmount));
            }
            else if (pizza != null)
            {
                pizza.Display();
                Console.WriteLine("|---------------------------------------------------------------|");
                Console.WriteLine("|\t\t\t\t\t\t Total = {0} AUD |", pizza.totalAmount);
            }
            else if (pasta != null)
            {
                pasta.Display();
                Console.WriteLine("|---------------------------------------------------------------|");
                Console.WriteLine("|\t\t\t\t\t\t Total = {0} AUD |", pasta.totalAmount);
            }

            Console.WriteLine("|---------------------------------------------------------------|\n");
            Console.WriteLine("| \t\t Offer");
            Console.WriteLine("|---------------------------------------------------------------|");
            if (pizza != null && pizza.countOrder >= 3 && pasta != null && pasta.countOrder >= 3)
            {
                pizza.DisplayOffer();
                pasta.DisplayOffer();
                Console.WriteLine("|A small box of Baklava (a famous dessert item)");
            }
            else if (pizza != null && pizza.countOrder >= 3)
            {
                pizza.DisplayOffer();
            }
            else if (pasta != null && pasta.countOrder >= 3)
            {
                pasta.DisplayOffer();
            }
            else
            {
                Console.WriteLine("| \t\t No offer received");
            }
            Console.WriteLine("|---------------------------------------------------------------|\n\n");
        }