lifo and peridoic inventory highlight answer

Shown below is activity for one of the products of Denver Office Equipment January 1 balance, 500 units @ $55 per unit $27,500 Purchases: January 10: see units @ $60 per unit January 20: 1,000 units 563 per unit Sales: January 12: 300 units January 28: 750 units Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses LIFO and a periodic inventory system Ending inventory Cost of goods sold