Microsoft Learning released hands-on labs covering the Microsoft Dynamics NAV 2009 R2 Inventory Costing functionality. These are a series of stand-alone hands-on labs that guide you through the process of working with the Inventory Costing module. The labs include:

1. Introduction to Hands-on Lab in Inventory Costing in Microsoft Dynamics NAV 2009 R2
2. Inventory Acquisition in Inventory Costing in Microsoft Dynamics NAV 2009 R2
3. Cost of Sold Goods in Inventory Costing in Microsoft Dynamics NAV 2009 R2
4. Inventory Adjustments in Inventory Costing in Microsoft Dynamics NAV 2009 R2
5. Inventory Costing in the General Ledger in Inventory Costing in Microsoft Dynamics NAV 2009 R2
6. Inventory Revaluation and Physical Inventory in Inventory Costing in Microsoft Dynamics NAV 2009 R2

All labs are available in the Training Materials section of PartnerSource and CustomerSource. 

https://mbs.microsoft.com/partnersource/communities/training/trainingmaterials/student/courseholicnav2009.htm

https://mbs.microsoft.com/customersource/training/trainingmaterials/student/courseholicnav2009.htm