Need to create an exchange process for POS to print a receipt for proof of exchange for a busy retail shop. Doing a 2 step process of refund and then do another sale is not efficient. If you do it under a cash sale it doesn't work as no cash transacted. Our customers don't have accounts so can't do it this way neither
Suggestion: If the refund item (or quantity) appeared in yellow to indicate it is a refund and then the sale appeared in black and if you could do more items on the exchange as well
