*An item won’t scan*
EVERY. SINGLE. CUSTOMER. EVER: Well, I guess it’s free. ^-^
I have found the best way to combat this! Look the customer dead in the eye and with the most serious, deadpan face say “No. That means I get to pick the price.”
“I GET TO PICK THE PRICE.”
I think you’ve destroyed the dreaded “it must be free,” phrase once and for all!