Check out the new Microsoft Product Licensing Advisor (MPLA), nifty new FREE tool that:

Provides Volume Licensing program comparisons and guidance. 

Simplifies Microsoft product selection through a series of questions. 

Produces a downloadable report and estimated retail price (ERP) quote in Microsoft Word or Excel.
 
Lets you review your report offline, and save your quote to send to someone, or get in touch with a real-live person.

Launch the Microsoft Product Licensing Advisor