Problem 8-62 (Algo) Determine Degree of Completion: FIFO Method, Missing Data (LO 8-1, 5) Saline Solutions uses process costing to account for production of its unique compound BG at its River Plant. The River Plant has two departments: R and S. Raw materials are added at two points in the production of BG. First, rubber pellets are added at the beginning of production in Department R. Next, a liquid thinner is added in Department R when the product is 70% complete with respect to conversion costs. Once the basic compound is completed in Department R, it is transferred to Department S for mixing and packaging. The following information is available from the River Plant for May. (No new material is added in Department S.) Department S Production and Costs: May Beginning inventory (67,000 units, 30% complete with respect to Department S costs) Total cost (Department R and Department S) cost: Beginning inventory Current work (575,000 units started) Department R costs. Department S costs $ 505,459 $3,475,100 1,229,031 Department R uses FIFO process costing to account for production. In January, beginning work-in-process inventory consisted of 67,000 units, 70 percent complete with respect to conversion. The cost of rubber pellets put in production in January was $2,520,000. The cost of thinner