Please solve it step by step

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: 500 units @ $60 per unit January 20: 1,000 units @ $63 per unit Sales: January 12: January 28: 800 units 750 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.) Answer is complete but not entirely correct. $ 28,238 X Ending inventory Cost of goods sold $ 97,063 X