Question

As a salesperson, you are paid $50 per week plus $3 per sale. This week you want your pay to be at least $110. What is the minimum number of sales you must make to earn at least $110?

Answer 1

110 (goal) - 50 (base pay) = 60 (pay from sales only)

60 (total pay from sales) / 3 (cost per individual sale) = 20 (qty of sales)

Answer 2

3s+50=|110
           |-50
      3s= 60
      3      3
        s =20

Therefore the salesperson will need 20 sales.