The Extra Dollar ?

Three men paid $30 for staying one night
in a motel. Each man paid $10 for the room.
The bill for the night came to $25.00.
The hotel clerk sent back $5 with the bell boy.
Each man accepted $1 back from that $5 and
gave the bell boy the remaining $2 as a tip.
Each man therefore paid $9 for the room.
Now, together they paid 3 x $9 = $27
and adding the $2 tip only equals $29.
Where did the extra dollar go?
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