X Limited entered into the following inventory-related transactions, listed in date order:

• 01 March 20X5: opening balance: 80 units, all bought on 28 February 20X5 at N$50 each

• 10 March 20X5: 40 units bought at N$70 each

• 15 March 20X5: 160 units bought at N$80 each

• 21 March 20X5: 140 units sold

1. If using the first-in-first-out method, the cost of goods sold for the month ended 31 March 20X5 will be N$8 400 and the inventory closing balance on 31 March 20X5 will be N$11 200.

2. If using the first-in-first-out method, the cost of goods sold for the month ended 31 March 20X5 will be N$11 200 and the inventory closing balance on 31 March 20X5 will be N$8 400.

3. If using the weighted average method, the cost of goods sold for the month ended 31 March 20X5 will be N$9 800 and the inventory closing balance on 31 March 20X5 will be N$9 800.

4. If using the weighted average method, the cost of goods sold for the month ended 31 March 20X5 will be N$9 333 and the inventory closing balance on 31 March 20X5 will be N$10 267.