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Nova Company's total overhead costs at various levels of activity follow: Assume that the total overhead costs consist of utilities, supervisory salaries, and maintenance. The breakdown of these costs at the 74,000 machine-hour level of activity is as follows: V= variable; F= fixed; M= mixed Nova Company's management wants to break the maintenance cost down into its basic variable and fixed cost elements. Required: 1. As shown, overhead costs in May amounted to $278,000. Determine how much of this consisted of maintenance cost. (Hint: To do this, it may be helpful to first determine how much of the $278,000 consisted of utilities and supervisory salaries. Think about the behaviour of variable and fixed costs!) (Do not round intermediate calculations. Round your answers to the nearest whole dollar amount.) 2. By means of the high-low method, estimate a cost formula for maintenance. (Do not round intermediate calculations. Round "Fixed cost" answer to the nearest whole dollar and "Variable cost" answer to 2 decimal places.) 3. Express the company's total overhead costs in the linear equation form Y=a+bX. (Do not round intermediate calculations. Round "Fixed cost" answer to the nearest whole dollar and "Variable cost" answer to 2 decimal places.) 4. What total overhead costs would you expect to be incurred at an operating activity level of 68,000 machine-hours? At an operating activity level of 83,000 machine-hours? (Do not round intermediate calculations. Round your answers to the nearest whole dollar amount.)

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