Things that make you go hmmmm

Three men go into a motel. The desk clerk said the room was $30, so each man paid $10 and went to the room. A while later, the desk clerk realized the room was only $25, so he sent the bellboy to the three guys' room with $5. On the way, the bellboy couldn't figure out how to split $5 evenly between three men, so he gave each man $1 and kept the other $2 for himself.
This meant that the 3 men each paid $9 for the room, which is a total of $27. Add to that the $2 the bellboy kept and the total is $29. Where is the other dollar?