QUESTION 3B,3C,4A,4B,4C ONLY THANKS

Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2011 purchases and sales transactions. Units Sold at Retail Date Activities Jan. 1 Beginning inventory Feb. 10 Purchase Mar. 13 Purchase Mar. 15 Sales Aug. 21 Purchase Sept. 5 Purchase Sept. 10 Sales Units Acquired at Cost 760 units @ $47.20/unit 360 units $43.20/unit 180 units $23.20/unit 320 units @ $63.20/unit 200 units 551.20/unit 640 units @ $78.20/unit 120 units @ $78.20/unit 760 units Totals 1,820 units 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) specific identification-units sold consist of 580 units from beginning inventory and 180 units from the March 13 purchase, and (c) weighted average cost. (Due to rounding, the sum of Cost of Goods Sold and Ending inventory may not equal the Cost of Good available for sales. Round your per unit costs to 2 decimal places. Round your final answers to the nearest dollar amount. Omit the "$" sign in your response.) Ending inventory $ (a) FIFO (b) Specific identification (C) Weighted average cost $ $ 4. Compute gross profit earned by the company for each of the three costing methods. (Round your per unit costs to 2 decimal places and inventory balances and final answer to the nearest dollar amount.Omit the "S" sign in your response.) Gross profit $ (a) FIFO (b) Specific identification (c) Weighted average cost $ $