Colby Limited is a manufacturing company whose total factory overhead costs fluctuate somewhat from year to year, according to the number of machine-hours worked in its production facility. These costs at high and low levels of activity over recent years are given below: Machine-hours Total factory overhead costs Level of Activity Low High 85,880 185,000 $42,885,880 $47,685,eee The factory overhead costs above consist of Indirect materials, rent, and maintenance. The company has analyzed these costs at the 85.000 machine-hours level of activity as follows: Indirect materials (variable) Rent (fixed) Maintenance (mixed) Total factory overhead costs $15, 215,800 17,680,000 9,870,000 $42,885,000 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 $47.005.000 at the high level of activity consists of maintenance cost. Maintenance cost 2 Using the high-low method, estimate a cost formula for maintenance. Y = 3. What total overhead costs would you expect the company to incur at an operating level of 90.000 machine-hours? Total factory overhead costs