estion 2 ( 20 marks) Oak Tree Ltd. Inventory records for a particular development program show the following at October 31, 2016: At October 30, sold 120 units of these programs. Oak Tree Ltd. uses the perpetual inventory system. Compute cost of goods sold and ending inventory, using each of the following methods: - Specific unit cost. - Weighted-average cost - First-in, first out cost Which method produces the highest cost of goods sold? Which method produces the lowest cost of goods sold? What causes the difference in cost of goods sold