The cost formula for the maintenance department of Rainbow Ltd. is $19,000 per month plus $7.80 per machine hour used by the production department. Required: Calculate the maintenance cost that would be budgeted for a month in which 6,800 machine hours are planned to be used. Maintenance cost b. Prepare an appropriate performance report for the maintenance department assuming that 7.090 machine hours were actually used In the month of May and that the total maintenance cost incurred was $68,960. (Indicate the effect of each varlance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (l.e., zero varlance).) Original Budget (6,800 MH) Flexed Budget (7,090 MH) Actual Cost Total maintenance cost Variance