Spring Corporation bases its predetermined overhead rate on the estimated machine-hours for the upcoming year. Data for the upcoming year appear below: Estimated machine-hours Estimated variable manufacturing overhead Estimated total fixed manufacturing overhead 5 70,000 6 .68 per machine-hour $ 1,283,800 The predetermined overhead rate for the recently completed year was closest to: O $6.68. O O $18.34 $25.02. $25.59