Jersey Corporation has a process costing system in which it uses the weighted-average method. The equivalent units for conversion costs for the month were 47,500 units. The beginning work in process inventory consisted of 15,000 units, 60% complete with respect to conversion costs. The ending work in process inventory consisted of 10,000 units, 75% complete with respect to conversion costs. The number of units started during the month was ____
a. 25,000 units
b. 34,000 units
c. 35,000 units
d. 40,000 units