Please help me with my hw assignment

The followings are inventory transactions during May.

5/1 Beginning inventory of 300 units at $10/unit

5/5 Bought 700 units at $11/unit.

5/10 Sold 600 units for $16/unit.

5/15 Bought 1,000 units at $12/unit.

5/25 Sold 1,300 units for $16/unit.

Instructions: Compute costs of goods sold (COGS) and costs of ending inventory for May using the following

methods under the perpetual inventory system as of 5/31.

1. Average method.

2. First In First Out method.

3. Last In First Out method.