/*
         *   Main method where some example scanned items are added and the discounted
         *   total is calculated and displayed.
         */
        static void Main(string[] args)
        {
            Checkout checkout = new Checkout();

            ScannedItem item1 = new ScannedItem("A99", 0.5f, 3, 1.30f);
            ScannedItem item2 = new ScannedItem("B15", 0.3f, 2, 0.45f);
            ScannedItem item3 = new ScannedItem("A99", 0.5f, 3, 1.30f);
            ScannedItem item4 = new ScannedItem("A99", 0.5f, 3, 1.30f);
            ScannedItem item5 = new ScannedItem("B15", 0.3f, 2, 0.45f);

            checkout.Scan(item1);
            checkout.Scan(item2);
            checkout.Scan(item3);
            checkout.Scan(item4);
            checkout.Scan(item5);

            Console.WriteLine("Discounted total: " + checkout.GetDiscountedTotal() + "\n");
        }
 /*
  *   Adds item to scanned items list.
  */
 public void Scan(ScannedItem item)
 {
     // Add item to scanned items
     scannedItems.Add(item);
 }