Missing Dollar

The Question...

Three nearly broke college men on their way to spring break stop at a motel for the night. The cashier tells them a room is $30. They each put in $10. Later, the manager tells the cashier the room should have only been $25, so the manager gives the cashier five $1 bills to return to the men. Not knowing how to divide $5 among three men, the cashier gives $1 back to each man and keeps the other $2 for himself. This meant that the three men each paid $9 for the room, which is a total of $27. Add the $2 that the cashier kept and you have $29. What happened to the other dollar?

The Answer...