A One-Person Automobile Oil Change in Rural Mississippi Has a Fixed

Multiple Choice

A one-person automobile oil change in rural Mississippi has a fixed overhead of $\$ 900.00$ per month. The variable cost per oil change $\$ 10.00$ . The charge is $\$ 30.00$ for one oil change. If the owner/worker Joe Smith desires to have a contribution per month of $\$ 2,100.00$ , the number of oil changes he should do per month is

A) 100
B) 300
C) 150
D) 75
E) none of the above