Replying to A mathematical riddle...

Three guys check into a whore-house for the night and the pimp tells them it’s $30 for the hooker, payable in advance. So, they each pay the pimp $10 and go to the hooker’s room. A few minutes later, the clerk realizes he has made an error and overcharged the trio by $5. He as...ks the bellhop to return $5 to the 3 guys who had just checked in. The bellhop sees this as an opportunity to make $2 as he reasons that the three guys would have a tough time dividing $5 evenly among them; so he decides to tell them that the pimp made a mistake of only $3, giving a dollar back to each of the friends. He pockets the leftover $2 and goes home for the day! Now, each of the three guys gets a dollar back, thus they each paid $9 for the room which is a total of $27 for the night. We know the bellhop pocketed $2 and adding that to the $27, you get $29, not $30 which was originally spent. Where did the other dollar go????