Question

A store sells portable MP3 players for $100 each and, at this price, sells
120 MP3 players every month. The owner of the store wishes to increase his
profit, and he estimates that, for every $2 increase in the price of MP3 players,
one less MP3 player will be sold each month. If each MP3 player costs the
store $70, at what price should the store sell the MP3 players to maximize
profit?

Answer 1

Profit = Revenue - Cost!

Answer 2

Its an optimization question...

Answer 3

It's very much business math!