pls explanin

Tree Seedlings has the following current-year purchases and sales for its only product. Units sold at Date Activities Units Acquired at Cost Retail Jan. 1 Beginning inventory 60 units @ $2 = $120 Jan. 3 Sales 38 units @ $8 Feb. 14 Purchase 86 units @ $3 - $258 Feb. 15 Sales 80 units @ $8 June 30 Purchase 110 units @ $4 = $440 Nov. 6 Sales 98 units @ $8 Nov. 19 Purchase 28 units @ $5 $140 Totals 284 units $958 216 units Required: The company uses a perpetual inventory system. a. Determine the costs assigned to ending inventory and to cost of goods sold using FIFO b. Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. c. Compute the gross margin for each method. Perpetual FIFO: Date Goods Purchased # of units unit Cost per Cost of Goods Sold # of units Cost per Cost of Goods sold unit Sold January 1 Cost per Inventory Balance # of units Inventory unit Balance 60 @ $ 2.00 = $ 120.00 January 3 38 @ $ 8.00 - $ 304.00 $ February 14 44.00 86 22 @ $ 2.00 = 108 $ 2.00 - $ 216.00 258.00 $ 258.00 February 15 $216.00 S $ 0.00 $ 2.00 $ 258.00 0.00 June 30 November 6 November 19 FIFO: LIFO: Sales revenue Cost of goods sold Gross margin $ 0 $ 0