You can use the Granule Lists to determine what objects are included in a certain granule or in what granule a specific object is included, and this way determine which granules your customer needs to buy in order to gain access to certain objects.
The spreadsheet lets you filter on Granule Numbers, Object Types and Object Numbers.
For prices and explanations of the granules see the Price List and the Price List Explanation documents under Pricing & Ordering|Pricing