Problem 7-41 Estimate Machine-Hours Worked from Overhead Data (LO 7-3) Melbourne Company estimated that machine-hours for the year would be 39,600 hours and overhead (all fixed) would be $150,480. Melbourne applies its overhead on the basis of machine-hours. During the year, all overhead costs were exactly as planned ($150,480). There was $22,800 in overapplied overhead. Required: How many machine-hours were worked during the period? (Do not round intermediate calculations.) Machine hours