In a process with 900 units of beginning Work in Process, the company completed and transferred out 9700 units during a period. There were 4800 units in the ending Work in Process that were 45% complete as conversion costs. Materials are added 80% at the beginning of the process and 15% when the units are 90% complete. How much is equivalent units of production for the period for material costs if the weighted-average method is used?