Which additional information is needed to solve this problem?

John wants to buy a new game for his computer. He can save $12 a week if he mows his neighbor's lawn and $10 a week if he babysits his nephew. How many weeks will it take John to save enough money to buy the computer game?

A.
amount John earns per hour babysitting

B.
the cost of the game

C.
total amount John can save in 1 week

Question

Which additional information is needed to solve this problem? 
 
John wants to buy a new game for his computer. He can save $12 a week if he mows his neighbor's lawn and $10 a week if he babysits his nephew. How many weeks will it take John to save enough money to buy the computer game?
 
 A.
amount John earns per hour babysitting
 
 B.
the cost of the game
 
 C.
total amount John can save in 1 week