Harper sells appliances. She makes a weekly salary of $450 plus 3% commission on her total sales for the week. If her sales this past week were $3,200, find her total earnings for the week.

The total earning for the week is $546

Step-by-step explanation:

Let us solve the question

∵ Harper sells appliances

∵ She makes a weekly salary of $450 plus a 3% commission on her

   total sales for the week

→ That means there is a fixed amount + amount depends on her sales

∴ Her total earning = 450 + 3% of total sales

∵ 3% = 3/100 = 0.03

∴ Her total earning = 450 + 0.03 (total sales)

∵ Her total sales this week were $3,200

→ Substitute it in the equation above

∴  Her total earning = 450 + 0.03(3,200)

∴ Her total earning = 450 + 96

∴  Her total earning = 546

∴ The total earning for the week is $546