Deon is a software salesperson. His base salary is $1800 and he makes $80 more for every copy of Math is Fun he sells. His total
pay, P (in dollars), after selling c copies is given by the following
P-1800+80c
Answer the following questions.
(a) If Deon's total pay is $4520, how many copies did he sell?
(b) What is Deon's total pay if he sells 24 copies?
