help i think im doing this right but im getting the wrong answer

The following information relates to Hogs Back Falls Ltd's inventory transactions during the month of February Cost/Unit $21.00 Feb. 1 Amount $149.100 10 14 Units 7.100 6,000 3,900 600 3,600 4.100 3,100 Beginning inventory Sale Purchase Purchase Sale Purchase Sale 18 $22.00 $25.00 $85.800 $15,000 25 26 $30.00 $123,000 28 All of the units sold were priced at $87.00 per unit. (a1) * Your answer is incorrect Hops Back Falls Ltd. uses the periodic inventory system. Calculate Hogs Back's cost of goods sold,gross margin, and ending inventory for the month of February using FIFO. Cost Go Sold $ 223,800 Gross Margin 5 223.000 Ending Inventory $