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Department R had 4,000 units in work in process that were 67% completed as to labor and overhead at the beginning of the pee to labor and overthead at the end of the period. All materials are added at the beginning of the process. The first-in, first-out me 32.740 36,800 30,00 28.740 ths. The first in, First-out method is Used to cost inventories. The number cf equvalent units of nroduction for conversigil coets for the peniod was