(a) Compute the equivalent units of production for materials and conversion costs for the month of September.

(b) Compute the unit costs for materials and conversion costs for the month.

(c) Determine the costs to be assigned to the units completed and transferred out and to work in process at the end of September.

The Polishing Department of Cullumber Company has the following production and manufacturing cost data for September. All materials are added at the beginning of the process, and conversion costs are incurred uniformly throughout the process. Production: Beginning inventory 1,880 units that are 100% complete as to materials and 30% complete as to conversion costs; units started during the period are 41,300; ending inventory of 5,400 units 10% complete as to conversion costs. Manufacturing costs: Beginning inventory costs, comprised of $20,800 of materials and $9,756 of conversion costs; materials costs added in Polishing during the month, $195,100; labor and overhead applied in Polishing during the month, $127,200 and $257,740, respectively