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long Run 11. Pickled Pigs Feet Pies {PPF Pies] are produced by a constant-cost industry,I where all rms are identical and each firm has fixed costs of $15. The following chart shows the industry-wide demand curve and the marginal cost curve of a typical rm: Industry-wide Demand Firm's Marginal Cost Curve Suppose the industry is in longrun equilibrium. 3. What is the price of PPF Pies? b. What is the number of firms in the industry? c. On the industry-wide short-run supply curve, what quantity corresponds to a price of 510