For 2017, Looz Supply Manufacturing uses machine-hours as the only overhead cost- allocation base. The accounting records contain the following information: Manufacturing overhead costs Machine-hours Estimated $400,000 80,000 Actual $480,000 100,000 Using job costing, the 2017 budgeted manufacturing overhead rate is: Select one: a. $8.00 per machine-hour b. $5.160 per machine-hour c. $12.00 per machine-hour d. $10.00 per machine-hour