Nova Company's lotal everhead costs at various lewels of actevity follow: Assurne that the total overhead costs consist of utilities, supervisory salaries, and maintenance. The breasdown of these couts at the 68,000 machine-hour kevel of activity is as follows: V= variables F= finedi M s mixed Nova Company's management wants to break the maintenance cost down into lts basic varlable and foxed cost elements. Required: 1. As shown overhead costs in May armounted to $278,000. Determine how much of this consisted of maintenance cost, itiunt fo do: this, it may be helpful to first determine how much of the $278,000 consisted of utilities and supervisory salarien. Think about bhe behavlour of yariable and fixed costsf) (Do not round intermediate colculotions. Round your answers to the nearest whale dellar ampunt.) 2. by means of the high-low method, estimate a cost formula for maimenarice. (Do not round intermedimte calculatiens. Alounet "Fixed cost" answer to the nenrest whele doliar nnd "Variable cost" nnswer to 2 decimal places.) 3. Express the company's total overbead costs in the linear equation formin Y=a+bX (Do not round intermedinte calculations. Round "Fixed coit" nnswer to the nearest whole doller and "Variable cost" answer to 2 decimnl pinces.) 4. What totaloverhead costs would you expect to be incurred ot an operating activity level of 68,000 machine-hours? At an operating activity level of 83,000 machine-hours? (Do not round intermediete calculations. Round your answers to the nearest whole doliar omount.)