You can break the shelf tag, or it can get broken through use and just never be replaced but it won't change that the POS system will constantly have its prices at the register (potentially) changed daily/hourly.
A question that might be important though, "Do customers shop based on the price they see on the shelf?" If I want a bag of apples and there isn't a price tag near enough to the bag of apples that I can tell how much the bag of apples cost, will I still try to buy a bag of apples?
You can break the shelf tag, or it can get broken through use and just never be replaced but it won't change that the POS system will constantly have its prices at the register (potentially) changed daily/hourly.
A question that might be important though, "Do customers shop based on the price they see on the shelf?" If I want a bag of apples and there isn't a price tag near enough to the bag of apples that I can tell how much the bag of apples cost, will I still try to buy a bag of apples?