The P-Part list shows all incorporated purchased parts.
You can see the planned and reported quantity, planned cost, rest deleted, planned SO mark-up, planned SO mark-up exception, reported cost without the SO mark-up, reported SO markup, reported SO mark-up exception and the difference in percent, cost difference for quantity and price, and the difference in percent for quantity and price. The Price date column is shown if you calculate using current price on purchased parts. There you can see (for price alternatives with a saved price date in the database) a date when the price of the purchased part was last changed/calculated. At the bottom of the list you will see a total sum of the incorporated parameters.
If the setting Manage purchase/manufacturing on project for parts? has been activated under the Inventory tab in the Settings procedure, the column IP (purchase on project) will be shown. You will then see if the incorporated material is purchased on project or not.