Running Company had the following information for the month of June: Work in process beginning inventory, June 1 Units transferred in Work in process ending inventory, June 30 3,100 units 15,700 units 3,900 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. The equivalent units for materials under the weighted-average method are calculated to be