Bought a lotto ticket and a scratcher for a total of $15 and handed the kid at the counter a $20. He hands me my tickets and I walk out the door realizing I never got my change. Walk back in and there is a line of 15 people. I walk to the side and tell the kid he forgot my change and he says he gave it to me and then returns to helping his customer. Shouldn't expect much intelligence from a gas station employee, but 20-15 isn't hard fucking math.