Crosshill Company's total overhead costs at various levels of activity are presented below: Month April May June Machine- Hours 46,000 36,000 56,000 66,000 Total Overhead Cost $184,780 $158,480 $211,080 $237,380 July Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 36,000-machine-hour level of activity in May is as follows: $ Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) 54,000 44,000 60, 480 Total overhead cost $ 158,480 The company wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the $237,380 of overhead cost in July was maintenance cost. (Hint To do this, first determine how much of the $237,380 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.)