The Puzzle of the Missing Dollar

This is a problem I found in a maths text book:

Three men had lunch in a busy restaurant. When it came time to pay their bill, each of the men gave to the waiter a ten-dollar note. Thus the waiter recieved $30 altogether.

But when the waiter added up the bill, he found it only came to $25. Knowing that $5 would not divide among the three men evenly, the waiter decided to give each of the men $1 change and put the remaining $2 in his pocket.

Now it appears that each of the men have paid $9 for their meal, and the waiter has $2; a total of $29.

Where is the missing dollar?

I couldn't find the answer to this one in the book , so I don't know the definite answer.

zzz.. I posted this in the wrong forum before