Shown below is activity for one of the products of Denver Office Equipment: January 1 balance, 640 units @ $50 per unit $32,000 Purchases: January 10: 640 units @ $50 per unit January 20: 1,120 units @ $57 per unit Sales: January 12: 800 units January 28: 780 units Required: Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses average cost and a perpetual inventory system. (Do not round intermediate calculations. Round your final answers to nearest whole dollar amount.) Ending inventory Cost of goods sold