Plastic Gym Makes Children's Jungle Gyms and Tree Houses

Plastic Gym makes children's jungle gyms and tree houses. The price of jungle gyms is $120, and its variable expenses are $90 per unit. The price of tree houses is $200, and its variable expenses are $100. Total fixed expenses are $253,750. Last year, Plastic Gym sold 12,000 gyms and 4,000 tree houses.
-Refer to the Figure.What is the sales mix of jungle gyms and tree houses (rounded down to whole numbers) ?

A) 2:3
B) 3:1
C) 3:2
D) 4:1