If the price is less than then the firm should shut down. fixed costs the maximum of marginal cost (MC) the minimum of average total cost (ATC) the minimum of average fixed cost (AFC) the minimum of average variable cost (AVC) Question 15 (1 point) What is necessarily true for a perfectly competitive firm if P > ATC. The firm should continue producing in the short-run and shut down in the long- run. In the long-run, firms will exit the industry. The firm is earning positive profit. The firm should shut down production immediately. The firm is earning zero profit