Crosshill Company's total overhead costs at various levels of activity are presented below: Month April May June July Machine-Hours 74,000 64,000 84,000 95,000 Total Overhead Cost $179,000 $ 187,000 $266,000 $240,000 Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 64,000-machine-hour level of activity in May is as follows: Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) Total overhead cost $ 50,000 20,000 117,000 $187,000 The company wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the $240,000 of overhead cost in July was maintenance cost. (Hint: To do this, first determine how much of the $240,000 consisted of utilities and supervisory salaries. Think about the behaviour of variable and fixed costs within the relevant range.) (Round the "Variable cost per unit" to 2 decimal places.) Maintenance cost in July 2. Using the high-low method, estimate a cost formula for maintenance. (Round the "Variable cost per unit" to 2 decimal places.) Machine- Hours Maintenance Cost High activity level Low activity level Change 0 $ 0 Variable cost element per MH Fixed cost element Y = 3. Express the company's total overhead cost in the form Y = a +bX. (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 $ 0 Y= 4. What total overhead cost would you expect to be incurred at an activity level of 79,000 machine-hours? (Round the "Variable cost per unit" to 2 decimal places.) Total overhead cost