During 2018, a company sells 20 units of inventory. The company has the following inventory purchase transactions for 2018: Number Unit Total Units CostCost $ 60 S 900 620 of Date Jan. 1 Sep. 8 Transaction Beginning inventory Purchase 15 10 62 25 $ 1,520 Calculate ending inventory and cost of goods sold for 2018 assuming the company uses LIFO with a periodic inventory system