When an exchange takes place and the originally purchased item's price is higher than the new item, a leftover balance will appear as a negative number to be paid to the customer. The customer can be paid cash or a given a gift card with the balance on it depending on the company. If the original item is less than the new item, the customer will pay the balance as you would a normal sales transaction.

All other function in the normal sale screen (add item, QOH, etc) function the same once the return button has been pushed.