Crosshill Company's total overhead costs at various levels of activity are presented below: Month April May June July Machine- Hours 45,000 35,000 55,000 65,000 Total Overhead Cost $175,050 $ 151,550 $198,550 $ 222,050 Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 35,000-machine-hour level of activity in May is as follows: Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) 42,000 55,000 54,550 Total overhead cost $ 151,550 The company wants to break down the maintenance cost into its variable and fixed cost elements. 3. Express the company's total overhead cost in the form Y= a +bX. (Do not round your intermediate calculations. Round the "Variable cost per unit" to 2 decimal places.) Variable Cost per Machine-Hour Fixed Cost Utilities cost Supervisory salaries cost Maintenance cost Total overhead cost $ 0.00 $ 4. What total overhead cost would you expect to be incurred at an activity level of 40,000 machine-hours? (Do not round intermediate calculations.) Total overhead cost