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Department A had 4,000 units in Work in Process that were 62% completed at the beginning of the period at a cost of $6,900. During the period, 31,500 units of direct materials were added at a cost of $72,450, and 33,000 units were completed. At the end of the period, 2,500 units were 34% completed. All materials are added at the beginning of the process. Direct labor was $25,300 and factory overhead was $4,800. The cost of the 2,500 units in process at the end of the period of the first in, first out method is used to cost inventories was Oa $6.158 Ob. 56.566 Oc. 55,750 Od 57382