Yesterday we celebrated Sunday by getting carry-out (!)
Total bill $11.47. Got out $12.00, ready to hand it to the window person.
"$10.47." Dumbly, I handed her the $12.00. She handed back .53 change and kept the extra dollar.
It was not a tip. I immediately realized something wasn't right. We got home and there were two cash register receipts in the bag. One was for $11.47 and one was for $10.47 with a (old age) discount.
So, I guess it was tip.