Department S had 500 units 60% completed in process at the beginning of the period; 9,000 units completed during the period; and 600 units 30% completed at the end of the period. What was the number of equivalent units of production for the period for conversion if the first-in, first-out method is used to cost inventories? Assume the completion percentage applies to both direct materials and conversion cost. 8,700 8,880 9,000 9,300