For 2018, Franklin Manufacturing uses machine - hours as the only overhead cost-allocation base. The estimated manufacturing overhead costs are $300,000 and estimated machine hours are 40,000. The actual manufacturing overhead costs are $520,000 and actual machine hours are 50,000. Using job costing, the 2018 budgeted manufacturing overhead rate is (Round the final answer to the nearest cent.) .. O A. $13.00 per machine-hour OB. $7.50 per machine-hour O c. $10.40 per machine-hour OD. $6.00 per machine -hour