Department A had 5,000 units in work in process that were 60% completed as to labor and overhead at the beginning of the period; 34,000 units of direct materials were added during the period; 31,000 units were completed during the period; and 2,000 units were 80% completed as to labor and overhead at the end of the period. All materials are added at the beginning of the process. The first-in, first-out method is used to cost inventories. The number of equivalent units of production for material costs for the period was Oa. 32,000 Ob. 29,800 Oc. 29,000 Od. 34,000