A company uses the weighted average method for inventory costing. During a period, Department A finished and transferred 50,000 units to Department B. Also, during the period, 10,000 units were started but brought only to a stage of being 3/5 completed. The number of equivalent units produced by Department A during the period was

a. 44,000 units. b. 50,000 units. c. 54,000 units. d. 56,000 units. e. 60,000 units.