Fabian corporation uses the weighted average method in its process costing system. The assembly department started the month with 9000 units in its beginning work in process inventory that were 70% complete with respect to conversion costs. An additinal 90000 units were transferred in from the prior department during the month to begin processing in the assembly department. During the month 87000 units were completed in the assembly department and straferred to the next processing department. There were 12000 units in the ending work in process inventory of the assembly department that were 20% complete with respect to conversion costs. What were the equivalent units for conversion costs in the assembly department for the month?

A 89400

B 87000

C 93000

D 83100