hello
monthly salary = $1150
he earns 3% commission on amount of sales
he sold = $272,000
the total amount he earned that month = 3% of $272,000 + $1150
let's find 3% of $272,000
[tex]\begin{gathered} \frac{3}{100}=\frac{x}{272000} \\ \text{cross multiply both sides} \\ 100x=3\times272000 \\ 100x=816000 \\ \text{divide both sides by 100} \\ \frac{100x}{100}=\frac{816000}{100} \\ x=8160 \end{gathered}[/tex]Bob earned $8160 on commission for that month
total amount he earned = $8160 + $1150 =$9310
Bob earned the sum of $9310 for that month