L02 E6-7B. Inventory Costing Methods-Periodic Method The Caitlin Company, which uses the periodic inventory system, has the following records: nbridge Business Publishers Chapter 6 Accounting for Inventory Ending inventory was 400 units. Compute the ending inventory and the cost of goods sold for the year using (a) first-in, first out, (b) weighted-average cost, and (c) last-in, first-out