Luke's Lubricants starts business on January 1. The following operations data are available for January for the one lubricant it produces. Gallons Beginning inventory 0 Started in January 162,000 Ending work-in-process inventory (80% complete) 18,000 Costs incurred in January follow. Materials Labor Manufacturing overhead 138,600 22,000 77,000 All production at Luke's is sold as it is produced (there are no finished goods inventories). Required: a. Compute cost of goods sold for January. (Do not round intermediate calculations.) b. What is the value of work-in-process inventory on January 31? (Do not round intermediate calculations.) a. Cost of goods sold for January b. Work-in-process inventory on January 31