Tipping a cashier is nice
Kevin just arrived at a restaurant to pick up his takeout order.
Kevin wants to pay for his meal.
Kevin pays for the meal with cash and tells the cashier to keep the change.
Kevin hands the cashier exact change for his meal.
The cashier is very grateful and feels happier and more motivated.
The cashier feels disappointed that they didn't receive a tip and like their work is unappreciated.