Walked in rather than use the drive-through at McDonald’s the other day. There was a long line outside so I thought service might be better inside. Found my place in line and overheard a dispute between a customer and cashier over change. When it was my turn, I paid with a $50 but the cashier rang it up as a $20. I pointed to the bill I’d handed her in the drawer where she’d placed it (on top of the $20s?) and she said, I know. and gave me correct change. I just thought it odd and worth mentioning.