6. Compute cost of goods sold and ending inventory, using each of the following methods: (20 marks) Oct. 1 Beginning inventory. 15 Purchase 26 Purchase 5 units 11 units @ 5 units @ $150 - 160 - 170 - $ 750 1,760 850 a) Specific unit cost, with two $150 units, three $160 units, and five $170 units still on hand at the end. b) Weighted average cost c) First-in, first-out cost