Duncan Hines Printed a 50 Cents-Off Coupon on the Inside

Duncan Hines printed a 50 cents-off coupon on the inside of their brownie boxes. They distributed 200,000 promotional packages, at a cost of $9,900 for design and production. They predict that the redemption rate will be 3%. They pay retailer handling and
Processing costs of 10¢ per coupon redeemed. What is the cost per coupon redeemed to Duncan Hines?

A) $2.25
B) $1.25
C) $0.50
D) $0.57