a car salesman earns a base salary of $ 1000 per month plus a commission of $ 200 for each car he sells . if the car salesman earned $ 2000 in march , how many cars does he need to sell in april in order to double his march earnings ?
Select the correct option.
A) 14
B) 15
C) 16
D) 17
E) 18

Rationale: 1000 + 200 x = 4000 x = 15 cars . the answer is b .
Answer: B