The campus barber laces still competition from the large number of shops that surround the campus area, and for all practical purposes the market is perfectly competitive, He charges $8 for a haircut and cuts hair for 20 people a day His shop is open 3 days a week Calculate his weekly total revenue $ (Enter your response as a whole number ) Calculate his average revenue per haircut $| (Enter your response as a whole number.) Calculate his marginal revenue per haircut. $|(Enter your response as a whole number.)