# A salesman earns a base salary of $100 per week plus a 5% commission on all sales over 500. Find his total earnings in a week in which he sells r dollars worth of merchandise, with r being greater than 500?

##### 1 Answer

Sep 7, 2017

#### Answer:

See a solution process below:

#### Explanation:

We can use this equation to find the salesperson's total earnings:

Where:

Susbtituting gives: