Hi SY Chan,
Thank you for the additional details. Let me continue to help you out.
As for the quantity correction, you can follow the steps for adjusting the quantity. However, for the price correction, you'll want to do it on the receipt transaction itself. Actually, it would be better if you can correct both the quantity and the price of the items on the Item Receipt transaction. That way, you'll have a correct Cost of Goods Sold value when you sell these items.
Let me know if you have more questions about your transactions.
