Artificial Unintelligence

The self serve machine isn't psychic. If you put in a bill, the machine will give you the change it wants, not the change YOU want, so if you need loonies instead of a toonie, quarters instead of dimes etc, you're better off going to a regular register. (In Aragorn LOTR voice)There will probably come a day when machines will be able to read your mind, but it is not this day. Lol!