Not every order is a fixed price paid in full on the spot. Checkout now handles two cases service businesses hit often.
Pay with Points
Customers apply their points balance against the total at checkout, and the payment breakdown shows exactly how much came off.
Deposits and Prices Confirmed Later
When an order needs to be seen before it can be priced, checkout takes a deposit and marks the total as still to be confirmed, instead of forcing a made-up figure.