Suppose a multi-product monopolist sells two complementary goods,A and B. Annual market demand for good A is Q^d_A = 600 - 25P_A - 12P_B. Each time a consumer buys A, his demand for B is Q^d_B = 4 - 0.4P_B. The marginal cost of good A is a constant $4, and the marginal cost of good B is a constant $0.50. Suppose the price of good B is $5. What is the effective marginal cost of selling a unit of good A? A) $5 B) $4 C) -$5 D) -$9

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The Answer of Suppose a multi-product monopolist sells two complementary goods,A and B. Annual market demand for good A is Q^d_A = 600 - 25P_A - 12P_B. Each time a consumer buys A, his demand for B is Q^d_B = 4 - 0.4P_B. The marginal cost of good A is a constant $4, and the marginal cost of good B is a constant $0.50. Suppose the price of good B is $5. What is the effective marginal cost of selling a unit of good A? A) $5 B) $4 C) -$5 D) -$9

Suppose a Multi-Product Monopolist Sells Two Complementary Goods,A and B