l5. Suppose ABC Corp. is a rm producing newsprint in a perfectly competitive industry. Its output is 1500 tonnes per month, the marginal cost of the last tonne produced is $7\"), and the average revenue per tonne is $620. In the short run, this rm should (3) reduce output. (b) increase output until average revenue is equal to marginal cost. (c) denitely shut down. (d) increase output until marginal revenue is equal to marginal cost. (e) The price of the product is not known, so it is not possible to determine