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: Highest Lowest Cost per month $38,000 30,000 46,000 26,000 Machine hours Using the high-low technique, estimate the annual fixed cost for maintenance expenditures: $235,200 $391.200. $237,200 $247,200 $454,200