Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why do some stores have card-only self-checkouts?
There are a couple of advantages that I can think of.  Since the machines are less complicated because they don't have to handle cash, they are less expensive and require less maintenance. Machines that handle cash require lots of moving parts.  Cash machines require lots of employee interaction. The machines need to be stocked with cash each day, and at the end of the day the cash needs to be taken out and counted. With a cashless machine, the computer does all the work.