A car salesman earns a base salary of $1,000 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?	Choose the most appropriate option:  A) 14  B) 15  C) 16  D) 17  E) 18
1000+200x=4000   x=15 cars.   The answer is 15.
<result>B</result>
A car salesman earns a base salary of $1,000 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?