Faster and easier
When I go grocery shopping at this local store near our house, I make sure I cash out at the register that has a barcode scanner rather than those whose cashier manually punches the prices of each item. Yes, there is still a store that has a manual register this side of the country. And it’s not like I don’t trust the person manning the cash register. It’s just that it’s faster and easier for a cashier with a barcode scanner to finish footing my bill, especially if I am shopping for two weeks.