The following table summarizes the results of applying a regression method in measuring the cost behavior of a maintenance department costs in relation to the number of patient days. Constant R2 X Coefficient $ 20,000 90% $8 Instructions 1- Is the behavior of the maintenance department costs considered a pure variable, pure fixed or a mixed cost. Justify your answer. 2- Suppose the estimated number of patient days 300 days, predict the amount of maintenance costs