I swear that kid who waited on me looked to be 10-12 years old. He couldn't have been working there (or anywhere) for very long, but he was more efficient and competent than some of the adults who have been working there for years. He rang up my special order without hesitation, not needing to hunt for the proper buttons on the keypad, and counted out my change quickly and accurately.
Kudos, young man. Stay in school. With your work ethic and quick mind, you could go far when you grow up.