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. 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 are: materials, $54,560; direct labor, $20,320; and factory overhead, $15,240.•Costs incurred during May are: 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.