denver office equipment

Shown below is activity for one of the products of Denver Office Equipment: January 1 balance, 520 units 550 per unit $26,000 Purchases: January 10: 520 units 555 per unit January 20: 1,640 units 559 per unit Sales: January 12: 780 units January 28: 770 units Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses LIFO and a perpetual inventory system