u/-yphen

Does anyone know a tap to pay device like one of those Square readers that is always set to a price? I'm trying to sell strawberries and each box cost the same and so they will just tap when they grab a box because it's going to be just a stand on the road with no people and we've had a problem with people stealing cash. I've heard of tip tap I think it's called but it's very expensive. I'm looking for something cheaper. Ideally something that just takes a percentage off each sale.