Harvest Companys total overhead cost at various levels of activity are presented below:

Month	Machine-Hours			Total Overhead Cost
March		56,000		$	410,100
April		46,000		$	348,100
May		66,000		$	472,100
June		86,000		$	596,100

Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 46,000 machine-hour level of activity is as follows:

Utilities (variable)	$	138,000
Supervisory salaries (fixed)		48,000
Maintenance (mixed)		162,100
Total overhead cost	$	348,100

The company wants to break down the maintenance cost into its variable and fixed cost elements.

Required:

1.	Estimate how much of the $596,100 of overhead cost in June was maintenance cost. (Hint: To do this, it may be helpful to first determine how much of the $596,100 consisted of utilities and supervisory salaries. Think about the behavior of variable and fixed costs within the relevant range.) (Do not round intermediate calculations.)

2.	Using the high-low method, estimate a cost formula for maintenance. (Round the "Variable cost per unit" to 2 decimal places.)

3.	Express the companys total overhead cost in the form Y = a + bX. (Round the "Variable cost per unit" to 2 decimal places.)

4.	What total overhead cost would you expect to be incurred at an activity level of 50,000 machine-hours? (Do not round intermediate calculations.)