Suppose a multi-product monopolist sells two complementary goods, A and B. Annual market demand for good A is QdA = 600 - 25PA - 12PB. Each time a consumer buys A, his demand for B is QdB = 4 - 0.4PB. 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. If the monopolist considers the effect of additional sales of A on the sales of good B, how many units of good A will it produce?

A. 415

B. 332.5

C. 220

D. 207.5


B. 332.5

Economics

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