The Owner of a Novelty Store Can Obtain Joy Buzzers

Multiple Choice

The owner of a novelty store can obtain joy buzzers from the manufacturer for 70 cents apiece. He estimates he can sell 40 buzzers when he charges $1.40 apiece for them and that he will be able to sell 15 more buzzers for every 10 cent decrease in price. What price should he charge in order to maximize profit?

A) $1.08
B) $1.18
C) $0.98
D) $1.28