show all the steps and formulas and where you got each number from. thank you

25 Probiem B121 Shown below is activity for one of the products of Denver Office Equipment Slegpor Shown below January 1 balance, 610 units $55 $33,550 Purchases: eBook Print Referonces January 1e: 61e units e6 January 28: 1,e3e units e$65 Sales: January 12: 1,800 units anuary 28: 750 units Required Compute the January 31 ending inventory and cost of goods sold for January. assuming Denver uses FIFO Ending inventory Cost of goods sold