6. BoChem Company uses the weighted-average method in its process costing system, in which all materials are added at the beginning of the process, and conversion costs are incurred uniformly. The Assembly Department started the month with 500 units in process that were 70% complete, transferred 2,500 units to Finished Goods Inventory, and had 150 units in process at the end of the period, 40% complete. For conversion costs, the total equivalent units of production are

A. 2,150 units

B. 2,560 units

C. 2,650 units

D. 2,850 units