Help me please

Inventory Calculations Arlington Company uses a periodic inventory system. It entered into the following purchases and sales transactions for March. Units sell for $85 per unit. Inventory costs are calculated at the end of the month. Date Activities Cost Beginning 1-Mar inventory 50 5-Mar Purchase 55 9-Mar Sales 16-Mar Purchase 60 25-Mar Purchase 62 29-Mar Sales For specific identification, the March 9 sale consisted of 80 units from beginning inventory and 340 units from the March 5 purchase; the March 29 sale consisted of 40 units from the March 16 purchase and 120 units from the March 25 purchase. a. Compute the Goods available for sale and the number of units for sale Cost of Goods Available for Sale Cost of # of Units Cost per Goods Unit Available for Sale Beginning inventory Purchases: 5-Mar 16-Mar March 25 Total b. Compute the number of units in ending inventory. Units available Less: Units sold Ending inventory (units) c. Compute the cost of ending inventory using the FIFO method Date Activities Units Sold Cost Beginning 1-Mar inventory 100 50 5-Mar Purchase 400 55 9-Mar Sales 420 16-Mar Purchase 120 60 25-Mar Purchase 200 62 29-Mar Sales 160