Question

Susan is a software salesperson. Her base salary is $2300 and she makes $60 more for every copy of Math is Fun she sells. Her total pay, P (in dollars), after

selling c coples is given by the following.
P=60c+2300
Answer the following questions.
(a) If Susan's total pay is $4280, how many coples did she sell?
coples
(b) What is Susan's total pay if she sells 21 coples?

Answer 1

(a) 4280 = 2300 + 60c, so 60c = 1980, and thus c = 33 copies

(b) 60(21) + 2300 = $3560