Maintenance expenses of a company are to be analyzed for purposes of constructing a flexible budget. Examination of past records disclosed the following costs and volume measures: Cost per month Machine hours Highest $88,000 99,000 Lowest $76,000 69,000 Using the high-low technique, estimate the annual fixed cost for maintenance expenditures: Multiple Choice 0 $457000 O $378.400 O $542,500 o $580.800 $220,300