[Fact Pattern #1] Kim Manufacturing uses a process cost system to manufacture Dust Density Sensors for the mining industry. The followinginformation pertainsto operations for the month of May. The beginning inventory was 20% complete for materials and 60% complete for conversion costs. The ending inventory was 40% complete for materials and 90% complete for conversion costs. Costs pertaining to the month of May are as follows: Units Beginning work-in-process inventory, May 1 Started in production during May Completed production during May Ending work-in-process inventory, May 31 16,000 100,000 92,000 Beginning inventory costs are materials, $20,280; direct labor, $20,320; and factory overhead, $15,240. Costs incurred during May are materials used, S467,680; direct labor, S182,800; and factory overhead, S389,200. 24,000 [1] ( Refers to Fact Pattern 1) Using the FIFO method, the equivalent cost per unit of materials for May is A. $4.80 B. $4.60 C. $4.50 D.S4.75