The customer says “I bought this red shirt yesterday but can you change it to black one”.
Technically speaking, the red shirt needs to be stoked-in and the black shirt needs to be stocked-out. This becomes more complex if there is a change in price. This involves a complex process of Sales, Sales Return and adjusting the price difference.
FusionRetail Exchange function from the POS Screen — It does all the calculation for you on a single key press.