I only had one cashier job, it was back in high school working at an ice cream shop. It didn’t take long before I got very quick at counting out change for the customers. I also learned to hear the difference between a modern quarter and dime and the pre-1964 kind that were still made of silver. They made a slightly brighter sound when dropped into the change drawer. I always had some quarters and dimes in my pocket to switch out with the silver ones. At the time I think the silver coins were worth about 4 times their face value.