No kidding. A couple of years ago, there was a fish & chips stand at our local farmers’ market, $6 per order. A high-school aged girl was behind the table and the mother was frying the food I ordered two orders and handed her a $20. She turns to her mother and says, plaintively, “He gave me a $20. . .” And the mother asks “Okay, so how much does he get back?” I thought the girl was going to start crying, so I said, quietly, “Eight dollars.” A high schooler who couldn’t subtract 12 from 20? Makes me despair for our school system.