The docking station industry is perfectly competitive. Each firm producing the stations has cost curve given by C = 400 + 20q + q². (You may assume this is both the short-run and the long-run cost curve.) Currently, there are 50 firms producing the stations, and the market demand is given by Q = 2000 - 25p. The long-run market equilibrium price is _____.

a. 20

b. 60

c. 80

d. 40