6 Nova Company's total overhead cost at various levels of activity are presented below. 10 points Month April May June 04:32:01 July Total Overhead Machine-Hours 70,000 Cost $198,000 60,000 $174,000 80,000 $222,000 90,000 $240,000 eBook Port Reference Assume that the total overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 60,000 machine-hour level of activity is: Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) Total overhead cost $48,000 21,000 105,000 $174,000 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 $246,000 of overhead cost in July was maintenance cost. (Hint to do this, it may be helpful to first determine how much of the $246,000 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 75,000 machine-hours? Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Required 41 Estimate how much of the $746 000 of marhead cert