hmm... here goes....
they paid $25 for the room, $1 each change, and $2 for the bellhop, giving $30. The $27 quoted ( 3 by $9 ) was not for the room, but for room plus bellhop.

on to simpler times...

I begin with T, have T in the middle and I end in T.
What am I?

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I wouldn't say that I'm always horny... it may be true, mind you, I just wouldn't say it!