Crosshill Company's total overhead costs at various levels of activity are presented below: Month April May June July Machine- Hours 48,000 38,000 58,000 68,000 Total Overhead Cost $172,160 $148,460 $195,860 $219,560 Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 38,000-machine-hour level of activity in May is as follows: $ Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) 49,400 42,000 57,060 Total overhead cost $ 148, 460 The company wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the $219,560 of overhead cost in July was maintenance cost. (Hint: To do this, first determine how much of the $219,560 consisted of utilities and supervisory salaries. Think about the behaviour of variable and fixed costs within the relevant range.) (Do not round intermediate calculations.) Maintenance cost in July 2. Using the high-low method, estimate a cost formula for maintenance. (Do not round your intermediate calculations. Round the "Variable cost per unit" to 2 decimal places.) Machine- Hours Maintenance Cost High activity level Low activity level Change Variable cost element Fixed cost element per MH Y = IX 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 Y = 4. What total overhead cost would you expect to be incurred at an activity level of 43,000 machine-hours? (Do not round intermediate calculations.) Total overhead cost