Trout Incorporated (Inc.) sells trout in a perfectly competitive market. Trout Inc. is able to sell trout for $600 per unit. In this market, there are 2000 firms competing with one another. Last year, Trout Inc. was able to earn an economic profit of $1,000,000 . The firm has purchased a permit to fish this season, insurance in case one of their workers gets hurt on the job, and a boat. Together, these items represent all of the firm's fixed costs and sum to $100,000 . Last year, Trout Inc.'s total revenue was $1,300,000 . What is the marginal revenue per unit for this firm?