Three travelers register at a hotel and are told that their rooms will cost 10 rupees each so they pay 30 rupees. Later the clerk realizes that he made a mistake and should have only charged them 25 rupees. He gives a bellboy 5 rupees to return to them but the bellboy is dishonest and gives them each only 1 rupee, keeping 2 rupees for himself. So the men actually spent 27 rupees and the bellboy kept 2 rupees. What happened to the other dollar of the original $30 rupees?
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