A monopolist faces the inverse demand function p = 300 – Q. Their cost function is c (Q) = 25 + 50Q. Calculate the profit maximizing price output combination
Profit is maximized where marginal revenue and marginal cost both are equal.
Demand Function
P = 300 - Q
Marginal revenue function is the same as demand function the only difference is, the coefficient of Q is double.
Marginal Revenue Function
MR = 300 - 2Q
Total Cost Function
TC = 25 + 50Q
Marginal cost can be calculated from the total cost function by differentiation.
MC = dTC / dQ
MC = 50
Equating both MR and MC
300 - 2Q = 50
2Q = 250
Q = 125
The profit-maximizing quantity is 125 units
To find the profit-maximizing price we will use this quantity in demand function.
P = 300 - Q
P = 300 - (125)
P = 175
The profit-maximizing price is $175
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