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A firm is producing 4 units of output at an average total cost of $45. When the firm produces 5 units of output, average tota
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Answer #1

Ans: $70

Explanation:

Total cost of producing 4 units of output = ATC * Quantity = $45 * 4 = $180

Total cost of producing 5 units of output = ATC * Quantity = $50 * 5 = $250

Marginal cost = Change in total cost / Change in Quantity

Marginal cost of the 5th unit = ( $250 - $180 ) / ( 5 -4 ) = 70 / 1 = $70

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