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| 17.Assume that a perfectly competitive firm produces 10 units of a good and sells them each for a price (P) equal to $15. If the marginal cost (MC) of the 10th unit is $15 and the average total cost (ATC) is $13, economic profit for the firm is closest to: A:A:$0. B:B:$20. C:C:$120. |
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