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Price (dollars per unit) 100 80 60 MC 40 20 MR 0 20 40 60 BO Quantity (units per week] Refer to the diagram above. If this market is a single-price monopoly, then O price is equal to marginal cost and the outcome is efficient. price is greater than the marginal cost and the outcome is inefficient. price is less than marginal cost, and consumer surplus is less than in a perfectly competitive market. O it is efficient because the monopoly is maximizing economic profit