The Mystery of the Missing Dollar

See if you can figure this out!!!!

Three women enter a hotel, and they each pay
$10 to rent a hotel room with 3 beds, which costs $30
They give the money to clerk at the front desk, and
they take their luggage to room 613.
Later, the clerk realizes that he overcharged them.
The room should have cost only $25. The clerk,
being the nice guy that he is, gives the bellboy
five $1 bills to give back to the women. The
bellboy brings the money to room 613.
The women, being the nice women that they are,
each take $1 and let the bellboy keep the extra $2.
Each woman originally paid $10, and they each accepted
$1 from the bellboy. That means that each woman actually
paid only$9. If three women paid $9 each, that means together
they paid $27 for the room. If the bellboy
kept $2 , that makes the total $29. But the women
originally paid $30 total.
$9*3=$27 $27+$2=$29

What happened to the missing dollar?