uantity (hours) Marginal Benefit ($) Marginal Cost ($) 1 45 5 2 30 10 3 20 15 4 10 20 5 5 25 6 -15 30 Assume the above table describes the marginal benefits and costs of exercising for additional hours. What is the cost of the 5th hour of working out? Note: enter answer with only numerical values and round up to the nearest tenth. For example, if you think the answer is "$101.58" then enter the answer "101.6" in the space below