halibut incorporated (inc.) sells halibut in a perfectly competitive market. halibut inc. is able to sell halibut for $400 per unit. in this market, there are 2000 firms competing with one another. last year, halibut 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, halibut inc.'s total revenue was $1,300,000 . what is the marginal revenue per unit for this firm?
