First day at work

A young man hired by a supermarket reported for his first day of work.

The manager greeted him with a warm handshake and a smile, gave him a broom, and said "Your first job will be to sweep out the store".

"But I'm a graduate" the young man replied indignantly.

"Oh, I'm sorry. I didn't realise that" said the manager. "Here, give me the broom

Spoiler:

- I'll show you how"