Market for Rollercoaster Rides 0 10 20 30 40 50 60 Quantity of Rides 36. Consider the market for the number of rides on a rollercoaster shown above. The demand curve is of the typical, representative consumer. What is producer surplus in the market equilibrium? a. $80 b. $40 c. $0 d $2 3?. Consider the market for the number of rides on a rollercoaster shown above. If park charges an entry fee of $20 in additional to the equilibrium price, how much surplus does the representative consumer earn? a. $0 b. $60 c. $80 d $20