Duggan Company applies manufacturing overhead to jobs on the basis of machine hours used. Overhead costs are expected to total $325,000 for the year, and machine usage is estimated at 125,000 hours. For the year, $342,000 of overhead costs are incurred and 130,000 hours are used. a. Compute the manufacturing overhead rate for the year. b. What is the amount of under- or overapplied overhead at December 31? c. Prepare the adjusting entry to assign the under- or overapplied overhead for the year to cost of goods sold