# Jill earns a yearly salary of $40,000 plus 15% commission on total sales. Shonda earns a $55,000 yearly salary plus 10% commission on total sales. If Jill and Shonda each have sales of $750,000, how much more total income does Jill earn for the year?

##### 1 Answer

Dec 8, 2016

Jill earned $22,500 more total income for the year.

#### Explanation:

The formula for total income is:

Remember, x% can be written as

First, let's calculate Jill's total income and call it

Then we can also calculate Shonda's total income and call it

To find out how much more Jill made we need to calculate