Shown below is activity for one of the products of Denver Office Equipment: January 1 balance, 670 units @ $60 $40, 200 Purchases: January 10: January 20: Sales: January 12: January 28: 670 units @ $54 1,020 units @ $60 900 units 800 units Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses LIFO periodic inventory system. Ending inventory Cost of goods sold 4