Year 1: Buy 10 units@$1, sell 5 units Year 2: Buy 10 units@$2, sell 10 units Year 3: Buy 10 units@$3, sell 10 units Year 4: Buy 10 units@$4, sell 10 units Year 5: Buy 10 units@$5, sell 10 units Year 6: Buy 10 units@$6, sell 10 units Year 7: Buy 10 units@$7, sell 10 units Year 8: Buy 10 units@$8, sell 10 units Year 9: Buy 10 units@$9, sell 10 units Year 10: Buy 10 units@$10, sell 10 units Year 11: Buy 5 units@$11, sell 10 units. if the company uses LIFO. what is the balance of ending inventory of year 10