30 h. : ): SECOND EXAM ( Not yet answered Marked out of 1.00 15 For 2020, Mariam's Animal Supply Manufacturing uses machine-hours as the only overhead cost-allocation base. The accounting records contain estimated and actual Manufacturing overhead costs of $100,000 and $120,000 respectively and estimated and actual Machine-hours of 20,000 and 25,000 respectively.Using job costing, the 2020 budgeted manufacturing overhead rate is .a per machine-hour $6.00 .b per machine-hour $4.00 . per machine-hour $4.80 .d per machine-hour $5.00