This is a riddle but help would be appreciated Three people go to the Apple store and to buy a mac book that costs $3000 and each persons puts $1000. But, the manager realizes this and suddenly for some reason changes the price to 2500 and tells the cashier to give the people 500 back. The cashier decides to give only 300 back and keep 200. So now each person has put 900 where did the missing $100 go?