Answer:
C. 18
Explanation:
Let x represent number of stereos.
We have been given that a salesman sold each stereo for $1500. He earned a commission of 16.5% on each stereo sold.
The amount of commission earned on each stereo would be 16.5% of 1500.
The amount of commission earned on x stereos would be
.
We are told his base salary is $33,170, so total salary of salesman would be
.
We are also given that last year he earned $37,625. We can represent this information in an equation as:
Therefore, the salesman sold 18 stereos last year.