Check my work Nova Company's total overhead cost at various levels of activity are presented April Machine Hours 53,000 43,000 63,000 73,000 Total Overhead Cost $199.060 $173,860 $ 224,260 $ 249,460 The breakdown of these costs Assume that the total overhead cost above consists of utilities at the 43,000 machine-hour level of activity is: 46,000 Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) Total overhead coat $17), 060 Nova Company's management wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the $249,460 of overhead cost in July was maintenance cost. (Hint: to do this, it may be helpful to first determine how much of the $249,460 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 Y = a +bX 4. What total overhead cost would you expect to be incurred at an activity level of 48,000 machine-hours