Suppose a company has fixed costs of $5000 and variable costs per unit of 3 4 x + 1350 dollars, where x is the total number of units produced. Suppose further that the selling price of its product is 1500 − 1 4 x dollars per unit. (a) Find the break-even points. (Enter your answers as a comma-separated list.) x = Incorrect: Your answer is incorrect. (b) Find the maximum revenue. $ (c) Form the profit function P(x) from the cost and revenue functions. P(x) = Find the maximum profit. $ (d) What price will maximize the profit? (Round your answer to the nearest cent.) $