EcoGoods Ltd. uses a periodic inventory system. It entered into the following transactions for August.

Date	Activities	Units Acquired at Cost	Units Sold at Retail
Aug. 1	Beginning inventory	220 units @ $65 per unit
Aug. 6	Purchase	460 units @ $70 per unit
Aug. 12	Sales		420 units @ $95 per unit
Aug. 18	Purchase	300 units @ $75 per unit
Aug. 26	Sales		280 units @ $105 per unit

For specific identification, the August 12 sale consisted of 100 units from beginning inventory and 320 units from the August 6 purchase; the August 26 sale consisted of 150 units from the August 18 purchase and 130 units from the August 6 purchase.

Required:

1. Compute the cost of goods sold and ending inventory using FIFO and LIFO methods.
2. Determine the weighted average cost per unit and the ending inventory value.
3. Analyze the financial performance of EcoGoods Ltd. under different inventory costing methods.
4. Provide a strategic recommendation on the optimal inventory costing method for EcoGoods Ltd., supported by financial analysis and industry trends.