There's a feature in the "My Brands" tab, where if you select a brand and go "more actions" you get a menu with the option "price inspector" at the bottom. 

When you click on that it will show you information like the distributor under the source column. This will help when placing orders! Also you can see the breakdown of the pricing we get from your available sources, inventory numbers, and other items like core charges, if there's estimated shipping available, and more.

Just search the MPN or product title you are looking for and it will bring up the information for the MPN.