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EnviroSpecialists is an environmental engineering company that provides assessments of the effect of new construction and proposed development on the surrounding landscape. Customers include large private developers as well as municipalities and the provincial and federal governments. Total overhead costs fluctuate somewhat from year to year according to the number of contracted (billable) hours worked by employees each year. These costs at high and low levels of activity over recent years are given below. Level of Activity Low High Total billable hours 17, 809 25, 990 Total overhead costs $308, 530 $352, 458 The total overhead costs above consist of office supplies, rent, and vehicle costs. Some vehicles used by the employees to complete their work are on long-term leases, while the majority are rented on a short-term basis as needed. The company has analyzed overhead costs at the 17.000 billable-hours level of activity as follows: Office supplies (variable) $ 18,530 Rent (fixed) 175, 990 Vehicle costs (mixed) 115, 990 Total overhead costs $ 308, 530 For planning purposes, the company wants to break down the maintenance cost into its variable and fixed cost elements. Required: 1. Estimate how much of the overhead cost of $352.450 at the high level of activity consists of vehicle costs. Note: Round the "Varlable cost per unit" to 2 decimal places. Level of Activity 17,000 hrs 25,000 hrs Vehicle Costs 2. Using the high-low method, estimate a cost formula for vehicle costs. Note: Round "Billable hour(s)" answer to 2 decimal places. Y = + X 3. What total overhead costs would you expect the company to incur at an operating level of 35,000 billable hours? Total overhead cost