Use case 4

###Title Checkout ###Precondition

• Customer must have ordered something;

###Primary Actor Waiter

###Main Success Scenario After finishing up with the order, waiter presses "Checkout" to proceed to the payment process. The system asks to register any coupons or discount cards. Waiter registers the discount card or coupon if available. Total amount is shown. System directs the waiter to payment.

###Extensions

• Discount card is not valid;
• Coupon is not valid;