| Checkout(CheckoutOptions) | Places an order on a cart whose amount due today is $0, without providing payment information |
| Checkout(AchPayment, CheckoutOptions) | Places an order |
| Checkout(CashPayment, CheckoutOptions) | Places an order where "cash" was used for payment |
| Checkout(CheckPayment, CheckoutOptions) | Places an order where a check was used for payment |
| Checkout(CreditCardPayment, CheckoutOptions) | Places an order |
| Checkout(SavedCreditCard, CheckoutOptions) | Places an order |
| Checkout(AchPayment, Decimal, CheckoutOptions) | Places an order |
| Checkout(CreditCardPayment, Decimal, CheckoutOptions) | Places an order, specifying a fixed payment amount |
| Checkout(SavedCreditCard, Decimal, CheckoutOptions) | Places an order, specifying a fixed payment amount |