In june, cory begins to save money for a video game and a tv he wants to buy in december. he starts with $20. each month he plans to save 10% more than the previous month. how much money will he have at the end of december?

Jun.       Jul.                 Agu.                 sept.                  oct.                     
20 + 2 => 22 + 2.2 = > 24.2 + 2.42 => 26.62 + 2.662 => 29.282 + 2.9282=>
Nov.                           Dec
32.2102 + 3.22102 =>  35.43122 + 3.543122 ===>>> $38.974342 (rounded: $39)