lontoure Company uses a periodic inventory system. It entered into the following calendar-year purchases and sales transactions. 1. Compute cost of goods available for sale and the number of units available for sale. 2. Compute the number of units in ending inventory. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and (d) specific identification. For specific identification, units sold consist of 645 units from beginning inventory, 345 from the February 10 purchase, 245 from the March 13 purchase, 95 from the August 21 purchase, and 340 from the September 5 purchase. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount. 4. Compute gross profit earned by the company for each of the four costing methods. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount