Nova Company's total overhead cost at varlous levels of activity are presented below: Assume that the total overhead cost above consists of utllitles, supervisory salarles, and malntenance. The breakdown of these costs at the 35,000 machine-hour level of activity is: Nova Company's management wants to break down the maintenance cost Into Its varlable and fixed cost elements. Required: 1. Estimate how much of the $222,350 of overhead cost In July was maintenance cost. (Hint: to do this, It may be helpful to first determIne how much of the $222,350 consisted of utllitles and supervisory salarles. Think about the behavlor of varlable and fixed costs.) 2. Using the high-low method, estimate a cost formula for malntenance in the form Y=a+bX. 3. Express the company's totaloverhead cost in the form Y=a+bX 4. What tota/ overhead cost would you expect to be Incurred at an actlvity level of 40,000 machine-hours? Complete this question by entering your answers in the tabs below. Express the company's total overhead cost in the form Y=a+bX. (Do not round your intermediate calculations. Round the "Variable cost per machine hour" to 2 decimal places.)