A riddle for everyone:

Three men check into a motel and pay $10 each for a total of $30. They complain to the office that their room wasn't clean and so the manager says he'll send someone down to take care of them. So, he sends an office assistant down to the room with $5, but he realizes on the way to the room that there isn't any way to split that $5 evenly between the three men, so he pockets $2, and gives each of the men a dollar back when he gets there for their trouble.

Now, that means each man has paid $9, for a total of $27, and the office-assistant pocketed $2. Where's the other dollar?