Do we need to pay anything extra for IIS when i have already bought a license for windows 2008 R2 Stanard server license

Hi,

I want to understand the licensing structure of Microsoft windows 2008 server standard edition.

If i buy a Microsoft windows 2008 server standard edition license ,can i activate the IIS in that without any extra cost involved ?

Can i use this license on commercial purpose for my website deployment ?

How much it will cost for me ?

Regards,

Deepak