maximize revenue

Question

A bus company charged me $60 per person for a sightseeing trip and obtained 40 people for the trip. The company has data that indicates that for the same trip, each $2 increase in the price above $60 results in the loss of one customer. What should the company charge to maximize revenue?

Answer 1

x represents each increase

R(x) = (60 + 2x)(40 - x)

Can you solve for x and answer?