Until a month ago, a food truck used to sell hot dogs for $2.50 each. At this price, the food truck used to sell an average of 5,500 hot dogs per day. When the food truck raised the price to $3.20, hot dogs sales dropped to an average of 4,800 per day. The food truck's fixed costs are $1,481.20 per day and the variable cost is $2.43 per hot dog. Answer the following questions: (E) Calculate the marginal profit. Then evaluate the marginal profit at x = 330 and interpret the results. The marginal profit is P'(x) = The marginal profit at x = 330 is $ Interpret the marginal profit. per hot dog. O A. At a production level of 330 hot dogs, the profit is decreasing at a rate of $ OB. At a production level of 330 hot dogs, the profit is increasing at a rate of $ per hot dog. (F) What is the average number of hot dogs per day that would maximize the food truck's profits at the current prices? The optimal average number of hot dogs is x =