Nova Company's total overhead cost at various levels of activity are presented below: Assume that the total overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these cos: at the 45,000 machine-hour level of activity is: 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 $278,550 of overhead cost in July was maintenance cost. (Hint: to do this, it may be helpful to first determine how much of the $278,550 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 50,000 machine-hours? Complete this question by entering your answers in the tabs below. Estimate how much of the $278,550 of overhead cost in July was maintenance cost. (Hint: to do this, it may be helpful to first determine how much of the $278,550 consisted of utilities and supervisory salaries. Think about the behavior of variable and fixed costs.) (Do not round intermediate calculations.) Complete this question by entering your answers in the tabs below. Using the high-low method, estimate a cost formula for maintenance in the form Y=a+bX. (Do not round your intermediate calculations. Round the "Variable cost per machine hour" to 2 decimal places.) 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.) Complete this question by entering your answers in the tabs below. What total overhead cost would you expect to be incurred at an activity level of 50,000 machine-hours? (Do not round intermediate calculations.)