Kimbeth manufacturing uses a process cost system to manufacture dust density sensors for the mining industry. The following information pertains to operations for the month of may: units beginning work in process inventory, may 1 16,000 started in production during may 100,000 completed production during may 92,000 ending work in process inventory, may 31 24,000 the beginning inventory was 60% complete for materials and 20% complete for conversion costs. The ending inventory was 90% complete for materials and 40% complete for conversion costs. Costs pertaining to the month of may are: beginning inventory costs: materials, $54,560; direct labor, $20,320; and factory overhead, $15,240. Costs incurred during may: materials used, $468,000; direct labor, $182,880; and factory overhead, $391,160. Using the first-in, first-out (fifo) method, the equivalent units of production for conversion costs are: a. 101,600 units. B. 85,600 units. C. 98,400 units. D. 88,800 units