Sample Midterm Work in one Excel file. Each task should be sold on a separate worksheet. Write all the answers into a Word file. You can insert the GeoGebra print screen images there as well. 1. A product may be made by using Machine I or Machine 2. The manufacturer estimates that the monthly fixed costs of using Machine I are $18,000, whereas the monthly fixed cost of using Machine II are $15,000. The variable cost of manufacturing 1 unit of the product using Machine 1 and Machine II are $15 and $20, respectively. The product sells for $50 each. a. Find the cost function associated with using each machine. b. Sketch the graphs of the cost function and the revenue function on the same set of axes. c. Which machine should management choose in order to maximize their profit if the projected sales are 450 units? 550 units? 650 units? d. What is the profit in each case in part (c)?