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 (70% complete) 15,000 costs incurred in january follow. materials $ 135,250 labor 24,000 manufacturing overhead 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 inventor