required: 1. Compute cost of goods available for sale and the number of units available for sale. Compute the cost assigned to ending inventory using specific identification. For specific identification, units sold consist of 600 units fro from the February 10 purchase, 200 from the March 13 purchase, 50 from the August 21 purchase, and 250 from the September 5 pur Note: Round your average cost per unit to 2 decimal places. 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