How do I solve this :(

Crosshill Company's total overhead costs at various levels of activity are presented below Total Overhead Machine-Hours 51,000 41,000 61,000 71,000 Cost $196,980 $173,180 $220,780 Month April May June July Assume that the overhead cost above consists of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 41,000-machine-hour level of activity in May is as follows: $ Utilities (variable) Supervisory salaries (fixed) Maintenance (mixed) 49,200 56,000 67,980 Total overhead cost $ 173,180 The company wants to break down the maintenance cost into its variable and fixed cost elements Required: 1. Estimate how much of the $244,580 of overhead cost in July was maintenance cost. (Hint: To do this, first determine how much of the $244,580 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