EcoHome Goods uses a periodic inventory system. The transactions for February are as follows:

Date	Activities	Units Acquired at Cost	Units Sold at Retail
Feb. 1	Beginning inventory	180 units @ $45 per unit
Feb. 3	Purchase	450 units @ $50 per unit
Feb. 10	Sales		400 units @ $70 per unit
Feb. 18	Purchase	300 units @ $55 per unit
Feb. 25	Sales		200 units @ $75 per unit

For specific identification, the February 10 sale consisted of 80 units from beginning inventory and 320 units from the February 3 purchase; the February 25 sale consisted of 150 units from the February 18 purchase and 50 units from the February 3 purchase.

Required:

1. Compute the ending inventory and COGS using the specific identification method.
2. Calculate the weighted average cost per unit and the ending inventory value.
3. Compare the financial performance of EcoHome Goods under FIFO and LIFO inventory costing methods.
4. Provide a recommendation on which inventory costing method EcoHome Goods should use, considering seasonal inventory variations.