(System of inequality word problem.)

Frankie is saving his money to buy the new Nintendo Switch. The switch is on sale for $300. He already has $215 saved up and his mother tells him she will pay him $7 for each extra chore he completes around the house. What is the minimum number of chores he must complete to have enough money for the Switch?

A. 12 chores
B. 14 chores
C. 13 chores
D. 11 chores