last night I went to pick up some take-out sushi at the last minute - 6 california rolls - and the total was just over $30. I added a $5 dollar tip. The place was busy but the cashier made a point of making me feel that my order was just as important as those who were sitting at the sushi counter ordering various items and consuming alcohol. Was $5 enough, should I have made it $6 (20%)? I just happened to have a five-dollar bill in my wallet.