Colby Company estimates that annual manufacturing overhead costs will be $600,000, Estimated annual operating activity bases are: direct labor cost $460,000, direct labor hours 40,000 and machine hours 80,000. The actual manufacturing overhead cost for the year was $60.000 and the actual direct labor cost for the year was $456,000. Actual direct labor hours totaled 39,800 and machine hours rotated 79,000. Colby applies overhead based on direct labor hours. Compute the predetermined overhead rate and determine the amount of manufacturing overhead applied. Determine if overhead is over or underapplied and the amount Overhead rate $ per direct labor hour Manufacturing overhead $ $ Waterway Company had the following department information for the month: Total materials costs $ 65000 Equivalent units of materials 10000 Total conversion costs $ 88000 Equivalent units of conversion costs 20000 How much is the total manufacturing cost per unit? O $ 6.50. O $ 4.90. $4.40. O $ 10.90