public static void SelectPaymentMethod(Cart myCart)
        {
            Console.WriteLine("\nWhich payment method will you be using today - Cash, Check, or Credit Card?");
            string input = Console.ReadLine().ToLower();

            while (true)
            {
                if (input != "cash" && input != "credit card" && input != "check")
                {
                    Console.WriteLine("Invalid input. Which payment method would you like to use - Cash, Check, or Credit Card?");
                    //input = Console.ReadLine();
                }
                if (input == "cash")
                {
                    CashPayment Cashy   = new CashPayment();
                    double      taxRate = .06;
                    Cashy.PayWithCash(myCart, taxRate);
                    ReceiptCash receipt = new ReceiptCash(Cashy, myCart);
                    Console.WriteLine("About to print receipt.");
                    receipt.PrintReceipt();
                    //ReceiptCash receipt = new ReceiptCash(Cashy);
                    //receipt.PrintReceipt(myCart);
                    break;
                }
                else if (input == "check")
                {
                    CheckPayment check = new CheckPayment();
                    check.PayWithCheck(myCart);
                    ReceiptCheck receipt = new ReceiptCheck(check, myCart);
                    receipt.PrintReceipt();
                    //return check;
                    break;
                }
                else
                {
                    CreditCardPayment card = new CreditCardPayment();
                    card.PayWithCreditCard(myCart);
                    ReceiptCreditCard receipt = new ReceiptCreditCard(card, myCart);
                    receipt.PrintReceipt();
                    //return card;
                    break;
                }
            }
        }
 //OVERLOAD CONSTRUCTOR
 public ReceiptCheck(CheckPayment checkPayment, Cart cart)
 {
     Cart         = cart;
     CheckPayment = checkPayment;
 }