Shown below is activity for one of the products of Denver Office Equipment: January 1 balance, 660 units @ $55 per unit $36,300 Purchases: January 10: 660 units $60 per unit January 20: 1,180 units @ $65 per unit Sales: January 12: January 28: 1,000 units 800 units. Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses average cost and a periodic inventory system. (Do not round intermediate calculations. Round your final answers to nearest whole dollar amount.) Ending inventory Cost of goods sold