Assume the industry for flour tortillas in Denver is perfectly competitive. There are 200 firms. Seventy-five of the firms are “high-cost,” with short-run supply curves QHC = 5P. The other 125 are “low-cost,” with short-run supply curves QLC = 8P. Quantities are measured in dozens of tortillas and prices in dollars. Derive the short-run industry supply curve for tortillas QS. Assume the market demand curve for tortillas is given by QD = 10,000 − 625P. Find the market equilibrium price and quantity. At this price, how many dozens of tortillas are produced by the high- and low-cost firms, respectively? Determine total industry producer surplus at the equilibrium. Especially need the producer surplus.

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Chapter8: Perefect Competition
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Assume the industry for flour tortillas in Denver is perfectly competitive. There are 200 firms. Seventy-five of the firms are “high-cost,” with short-run supply curves QHC = 5P. The other 125 are “low-cost,” with short-run supply curves QLC = 8P. Quantities are measured in dozens of tortillas and prices in dollars. Derive the short-run industry supply curve for tortillas QS. Assume the market demand curve for tortillas is given by QD = 10,000 − 625P. Find the market equilibrium price and quantity. At this price, how many dozens of tortillas are produced by the high- and low-cost firms, respectively? Determine total industry producer surplus at the equilibrium.

Especially need the producer surplus.

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