In a process with 740 units of beginning Work in Process inventory, the company completed and transferred out 9600 units during a period. There were 5100 units in the ending Work in Process inventory that were 60% complete as to conversion costs. Direct materials are added 80% at the beginning of the process and 20% 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? 10560 equivalent units of production 13680 equivalent units of production 14700 equivalent units of production O 11520 equivalent units of production