Hello!
The answer is: $525
Why?
The important fact that we need to consider is that he will earn a 15%of commission only on the sales he makes after his first $1000 in sales, it means that he will earn a 15% for all of his but I will happen only after $1000.
So,
First, we need to convert the 15% into a real number, we can do it by dividing the given % into 100,
Therefore,
![15=100=0.15](https://img.qammunity.org/2020/formulas/mathematics/high-school/8icoad0e62jl4zd1mm9pxspx1p77wg3wk1.png)
![GrossPay=WeekPay+($2500-$1000)*0.15\\GrossPay=$300+($2500-$1000)*0.15\\GrossPay=$300+($1500)*0.15\\GrossPay=$300+225=$575](https://img.qammunity.org/2020/formulas/mathematics/high-school/w1yhtzq8h8itmtj0sbbe5od8yokvfp3qh4.png)
So, the gross pay for the week will be $575