Crosshill Company's total overhead costs at various levels of activity are presented below:

Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the

$60,000-$machine$-$hour level of activity in May is as follows:

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

Required:

Estimate how much of the $$246,000$ of overhead cost in July was maintenance cost. $($Hint: To do this, first determine how much of

the $$246,000$ 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.$)$

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

$Y=$

Express the company's total overhead cost in the form $Y=a+bx.($Round the "Variable cost per unit" to $2$ decimal places.$)$

$Y=$

What total overhead cost would you expect to be incurred at an activity level of $75,000$ machine$-$hours? $($Round the "Variable cost

per unit" to $2$ decimal places.$)$