JUST FOR FUN

Crazy Math problem:

Three men went on hunting trip and they rented a room.
The motel was $30 a night so they all paid $10.00.
3 times 10.00 = $30.
They went to their room and the owner of the hotel said,  “wait a minute, i charged them too much.
He told the bell boy to take $5.00 back to the men.
The bill boy thought, “how can I split $5 up with three men?”
He kept two and give each man one dollar back.
So, the men actually paid $9 each for the room.
3 times 9 is 27.00, bellboy’s 2 = 29
What happened to the extra dollar??