Advanced Disk Drive Company operates a computer disk manufacturing plant. Direct materials are added at the end of the process. The following data were for June 2020: Work in process, beginning inventory 151,400 units Transferred-in costs (100% complete) Direct materials (0% complete) Conversion costs (85% complete) Transferred in during current period Completed and transferred out 451,200 units 401,000 units Work in process, ending inventory 202,000 units Transferred-in costs (100% complete) Direct materials (0% complete) Conversion costs (65% complete) Required: Calculate equivalent units for conversion costs using the FIFO method