Suppose that the perfectly competitive market for granola bars is made up of identical firms with long-run total cost functions given by TC(Q) = 8Q3 - 40Q2 200Q. Assume that these cost functions are independent of the number of firms in the market and that firms may enter or exit the market freely. Market demand is QD = 8,000 - 3.5P, where price is in cents. In the long-run equilibrium, there are ____ firms in the industry