Three Americans went into a motel to book a night. The cashier told them the room rate is USD30.00 per night without breakfast.
Three American decided to rent the room and split the bill equally. That is USD10.00 per person. The bell boy show them the room.
Later in the day, the Cashier realize that she has make a mistake as there is a promotion going on and the manager of the shift confirmed that the room under promotion is USD25.00 per night and insist the cashier return the excess USD5.00 to the guest. She send the bellboy to return the excess USD5.00 to them
The three American was gladful for their honesty and also find it hard to split the USD5.00 between 3 of them so they decided to give USD2.00 to the Bellboy as tips and each one took back USD1.00. Hence each of the American only spend USD9.00.
If we are to calculate that each American spend USD9.00, then the total they spend is USD27.00 and adding the bellboy USD2.00 they gave as tips, actual total spending is USD27 + USD2 equal to USD29.00 which originally they all spend USD30.00.

Where and what happen to the USD1.00? Who ate it up?