The manager of the main laboratory facility at CitiHealth Center is interested in being able to predict the overhead costs each month for the lab. The manager believes that total overhead varies vith the nur lab tests performed but that some costs remain the same each month regardless of the number of lab tests performed. The lab manager collecled the following data for the first seven months of the year. View the data. Use the high-low method to determine the laboratory's cost equation for total laboratory overhead. Use your results to predict total laboratory overhead if 3,500 lab tests are performed next month. Let's begin by determining the formula that is used to calculate the variable cost (slope). Change in cost Change in volume Now determine the formula that is used to calculate the fixed cost component. Total operating cost Total variable cost Use the high-low method to determine CitiHealth's operating cost equation. (Round the variable cost to the nearest cent.) y= x+ Data