Helpful Pharmaceuticals, Inc. has a monopoly on one of its products. The company is currently producing 154 units. Help them decide if they should increase output by one more unit. What is the marginal revenue of the 155 th unit? Helpful Pharmaceuticals, Inc. Quantity (Q) Total Revenue (TR) Marginal Revenue (MR) Total Cost (TC) Marginal Cost (MC) 150 $ 7 , 500 ? $ 500 $ 500 151 $ 7 , 950 ? $ 775 $ 275 152 $ 8 , 860 ? $ 1 , 000 $ 225 153 $ 9 , 465 ? $ 1 , 250 $ 250 154 $ 9 , 690 ? $ 1 , 650 $ 400 155 $ 9 , 800 ? $ 2 , 500 $ 850 156 $ 9 , 875 ? $ 4 , 000 $ 1 , 500 157 $ 9 , 925 ? $ 6 , 400 $ 2 , 400