A men's salon pays its barbers in different ways: some on a base plus commission, some on a salary with a target, some on commission alone. It sells packages as well as single services, takes Vodafone Cash at the counter, and works in Arabic from the first screen.
Off-the-shelf POS tools handle one of those well and the rest with a spreadsheet on the side. The ask was one system the owner could run without calling a developer.