Date and Transaction	Units and Value	Additional notes
Beginning Inventory	30 units @ $10.50
10/4 Purchase	70 units @ $9.00	Discount 2%, 5 units returns, $0.05 freight
10/6 Purchase	40 units @ $9.50	Discount 2%, $0.05 freight
10/10 Sale	100 units @ $11
10/15 Purchase	60 units @ $10.00	Discount 2%, 10 returns, $0.05 freight
10/20 Purchase	50 units @ $11.00	5 returns, $0.05 freight
10/25 Sale	100 units @ $12

1. Record COGS and calculate ending inventory using a periodic weighted-average cost assumption.