A salesperson earns commission on the sales that she makes each month.
• The salesperson earns a 4% commission on the first $4,000 she has in sales.
• The salesperson earns a 6% commission on the amount of her sales that are greater than $4,000.
Part A
This month the salesperson had $9,000 in sales. What amount of commission, in dollars did she earn?
A $485
B $500
$460
$480
Part B
The salesperson earned $670 in commission last month. How much money, in dollars, did she have in sales last month?
Enter your answer in the box.