We found that the estimated rate of increase in the cost when x = 60,000 is $318 per game system. We are asked to compare this estimate to the exact cost of producing the 60,001st game system. In order to find the exact cost of producing the 60,001st game system, we can find the exact cost of producing 60,000 game systems in an hour and the exact cost of producing 60,001 game systems in an hour and take the difference of the two numbers. Recall that the cost for the company to produce x game systems per hour is given by the cost function C(x) = 700,000 + 270x + 0.0004x². So the cost for the company to produce 60,000 game systems in an hour is given by the following. C(x) = 700,000 + 270x + 0.0004x² C(60,000) = 700,000 + 270(60,000) + 0.0004(60,000)² The cost for the company to produce 60,001 game systems in an hour is given by the following. C(x) = 700,000 + 270x + 0.0004x² C(60,001) = 700,000 + 270(60,001) + 0.0004(60,001)² = X Therefore, the exact cost for the company to produce the 60,001st game system is given by the following. C(60,001) C(60,000) - = Comparing this to the estimated value of $318 per game system, the actual value is [---Select--- the estimated value.