(b) What is the amount of under-or overapplied overhead at December 31? Manufacturing Overhead eTextbook and Media List of Accounts Save for later Attempts: 0 of 3 used Submit Answer Sheridan Company applies manufacturing overhead to jobs on the basis of machine hours used. Overhead costs are estimated to total $290,030 for the year, and machine usage is estimated at 126,100 hours. For the year. $308,530 of overhead costs are incurred and 130,100 hours are used