The factory overhead costs above consist of indirect materials, rent, and maintenance. The company has analyzed these costs at the 74,000 machine-hours level of activity as follows: For planning purposes, the company wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the factory overhead cost of $47,837,000 at the high level of activity consists of maintenance cost. 2. Using the high-low method, estimate a cost formula for maintenance. 3. What tota/ overhead costs would you expect the company to incur at an operating level of 79,000 machine-hours