Check my work Total Machine- Overhead nth April Hay June July Hours Cost 45,000 174,750 35,000 151,250 55,000198,250 65,000 221,750 Assume that the total overhead cost above consists of utilities, superviso at the 35,000 machine-hour level of activity is: ry salaries, and maintenance. The breakdown of these costs Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) Total overhead cost $ 42,000 55,000 54,250 151,250 management wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the $221.750 of overhead cost in July was maintenance cost. (Hint to do this, it may be helpful to first determine how much of the $221,750 consisted of utilities and supervisory salaries. Think about the behavior of variable and fixed costs.) 2. Using the high-low method, estimate a cost formula for maintenance in the form Y -a +bX 3. Express the company's total overhead cost in the form Ya + bX 4. What total overhead cost would you expect to be incurred at an activity level of 40,000 machine-hours