2410.11 – A Salesman's Commission

Ormond's dad Luther sells solar panels. He receives a salary of $400 a week plus 1.2% commission on his sales. If his income last week was $1360, how much were his sales that week?

Solution

Let $x$ be Luther’s sales for the week. Then:

\begin{aligned} \$400 + 0.012x &=& \$1360 \\ 0.012x &=& \$960 \\ x &=& \$960/0.012 \\ x &=& \$80,000. \end{aligned}