Department A had 4,900 units in Work in Process that were 77% completed at the beginning of the period at a cost of $7,000. During the period, 31,900 units of direct materials were added at a cost of $76,560, and 34,000 units were completed. At the end of the period, 2,800 units were 29% completed. All materials are added at the beginning of the process. Direct labor was $26,800 and factory overhead was $4,000. The cost of the 2,800 units in process at the end of the period if the first-in, first-out method is used to cost inventories was

a.$6,720

b.$8,332

c.$7,526

d.$7,123