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 xx be Luther’s sales for the week. Then:

$400+0.012x=$13600.012x=$960x=$9600.012x=$80,000\begin{aligned}\$400 + 0.012x &= \$1360 \\0.012x &= \$960 \\x &= \dfrac{\$960}{0.012} \\x &= \$80,000\end{aligned}