Answer:
C. 18
Step-by-step 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.
[tex]1500\times \frac{16.5}{100}=15\times 16.5=247.5[/tex]
The amount of commission earned on x stereos would be [tex]247.5x[/tex].
We are told his base salary is $33,170, so total salary of salesman would be [tex]247.5x+33,170[/tex].
We are also given that last year he earned $37,625. We can represent this information in an equation as:
[tex]247.5x+33,170=37,625[/tex]
[tex]247.5x+33,170-33,170=37,625-33,170[/tex]
[tex]247.5x=4455[/tex]
[tex]\frac{247.5x}{247.5}=\frac{4455}{247.5}[/tex]
[tex]x=18[/tex]
Therefore, the salesman sold 18 stereos last year.