The Wedding Shower Gift -Math riddle

63.Math Riddles

Janie's friends were chipping in to buy her a wedding shower present. At first, 10 friends chipped in, but 2 of them dropped out. Each of the 8 had to chip in another dollar to bring the amount back up. How much money did they plan to collect?

Explanation :  

$40 (10 at $4, or 8 at $5)