Please help me answer #3 and #4

3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and (c0 specific identification. For specific identification, units sold consist of 600 units from beginning inventory, 300 from the February 10 purchase, 200 from the March 13 purchase, 50 from the August 21 purchase, and 250 from the September 5 purchase. 6 Answer is not complete. (a) FIFO $ 30,000 0 (b) LIFO $ 18,000 9 (c) Weighted average $ 17,156 a (d) Specic identication 4. Compute gross profit earned by the company for each of the four costing methods. (Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount.) 6 Answer is not complete. Sales Less: Cost of goods sold Gross prot $ 0 $ 0 $ 0 $ 0 Problem 5-3A (Static) Periodic: Alternative cost flows L0 P1 Montoure Company uses a periodic inventory system. It entered into the following calendar-year purchases and sales transactions. Date Activities Units Acquired at Cost Units Sold at Retail Jan. 1 Beginning inventory 6% units@ $45 per unit Feb. 10 Purchase 400 units@ $42 per unit Mar. 13 Purchase 200 units@ $27 per unit Mar. 15 Sales 800 units@ $75 per unit Aug. 21 Purchase 100 units@ $50 per unit Sept. 5 Purchase 500 units@ $46 per unit Sept. 10 Sales 600 units@ $75 per unit Totals 1,800 units 1,400 units Required: 1. Compute cost of goods available for sale and the number of units available for sale. 9 Answer is complete and correct. Cost of goods available for sale $ 77,200 9 Number of units available for sale 1,800 0 units 2. Compute the number of units in ending inventory. 9 Answer is complete and correct. 400