Ask Mr. Wizzo!

Okay Mr. Wizzo here it goes!!

3 guys walk into a hotel and ask the front desk clerk how much a room costs.(i know 3 guys sharing a room!! Not the point)
The clerk replied that it would be 30 bucks
Each guy gives up and ten dollar bill and the front desk guy tells the bellboy to show them to their room.
When the bellboy gets back to the front desk, the clerk hands him five dollars and says he over charged the 3 guys, and if he could please give them the change.
In the elevator the bellboy wonders how he is going to split 5 dollars by three and so the obvious solution to him is to keep 2 bucks and give each guy back a dollar.

That means each guy paid 9 bucks whish equals 27 dollars, plus the two dollars the bellboy kept that would make it 29 bucks!!

Now here is the question??

What happened to the other dollar????

Good luck with this one!!!
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