Suppose the price of an item in a perfectly competitive market is $20. For a firm in this market, MC = MR at an output of 100 units. The average total cost at this output level is $4 per unit, and TVC is $800. We may conclude that

A. the firm should shut down because other firms will enter the industry as the market is perfectly competitive.
B. the firm should continue to produce because P>AVC.
C. the firm should shut down because its FC is $400 and its TC is $500.
D. the firm should shut down because TC > TR.


Answer: B

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