The Aspen Corporation uses the weighted-average method in its process costing system. The company recorded 24,400 equivalent units for conversion costs for November in a particular department. There were 4,000 units in the ending work in process inventory on November 30 which were 60% complete with respect to conversion costs. The November 1 work in process inventory consisted of 5,000 units which were 40% complete with respect to conversion costs. A total of 22,000 units were completed and transferred out of the department during the month. The number of units started during November in the department was: