The Renaissance Company uses the weighted-average method in its process costing system. The May 1 work in process inventory in a particular department consisted of 16,000 units, which were 50% complete with respect to conversion costs. The company recorded 59,000 equivalent units of production for conversion costs for May in that department. There were 12,000 units in that department's ending work in process inventory on May 31, which were 75% complete with respect to conversion costs. A total of 50,000 units were completed and transferred out of the department during the month. The number of units started during May in the department was