Total Marginal Marginal Marginal Quantity Price Revenue Revenue Total Cost Cost Total Profit Profit 0 385 0 -- 5 -- -5 -- 1 325 325 325 25 20 300 305 2 295 590 265 45 20 545 245 3 265 795 205 65 20 730 185 4 235 940 145 85 20 855 125 5 205 1025 85 105 20 920 65 6 175 1050 25 125 20 925 5 7 145 1015 -35 145 20 870 -55 8 115 920 -95 165 20 755 -115 What quantity should the firm produce to maximize profit? What is the marginal revenue at the optimal quantity? What is the marginal cost at the optimal quantity? What is the maximum profit? (> ()