12. During 2018, a company sells 20 units of inventory. The company has the following inventory purchase transactions for 2018: Number of Units Total Cost Cost 18 55 990 Unit Date Jan. 1 Sep. 8 Transaction Beginning inventory Purchase 57 855 $ 1,845 15 Calculate ending inventory and cost of goods sold for 2018 assuming the company uses LIFO with a periodic inventory system Ending inventory Cost of goods sold