Seller Central: Inventory Reports
Once you have downloaded and opened your open listing light report, you will see the following fields of columns, cell SKU, quantity, price, and product id. The cell SKU column refers to the stock keeping units, which are unique blocks of letters and or numbers that identify your products. SKUs are signed by you as the seller.
The quantity column refers to the quantity of the product available for purchase. The price column refers to the price you are asking for the product, and the product ID column refers to the ASIN, ISBN, UPC or EAN for the item.