Total Overhead Cost Machine Month April May June July Hours 48,00e 198,180 38,00 $173,08e 58,000 223,280 68, 248,38e Assume that the total overhead cost above consists of utilities, supervisory salaries, and malntenance. The preakdown of these costs at the 38,000 machine-hour level of activity is: Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) Total overhead cost $49,406e 58,000 65,680 $173,086e Nova Company's management wants to break down the malntenance cost Into its varlable and fixed cost elements Required 1. Estimate how much of the S248,380 of overhead cost In July was maintenance cost. (Hint: to do thls, It may be nelpful to first determine how much of the $248,380 consisted of utilities and supervisory salaries. Think about the pehavior of varlable and fixed costs.) 2. Using the high-low method, estimate a cost formula for malntenance In the form Ya bX. 3. Express the company's total overhead cost In the form Y abx. 4. What total overhead cost would you expect to be Incurred at an activity level of 43,000 machine-hours