oltenberg Co. had the following information for the month of June: Work in process beginning inventory, June 1 3,900 units Units transferred in 13,300 units Work in process ending inventory, June 30 3,100 units Beginning work-in-process inventory is 30 percent complete as to conversion. Ending work-in-process inventory is 50 percent complete as to conversion. Materials are added at the end of the process. How many units were completed in June