Jakiaya 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... 25,000 hrs Estimated variable manufacturing overhead ............. $4 per machine hour Estimated total manufacturing overhead $600,000 The predetermined overhead rate for the recently completed year was closest to: Select one: O a. $40.00 per machine-hour O b. $60.00 per machine-hour c. $15.00 per machine-hour O d. $100.00 per machine-hour