Upgrading RAM on Unibody 13-inch Macbook HELP

[tabasco70]

I bought a 2.4 Ghz 13-inch Macbook with 2GB of RAM last November, and I was thinking about upgrading to 4GB. I had several questions:
Is my computer compatible with 4GB of RAM? (Will it fit) Is 2 the limit?
How much will it cost?
Do I simply need to buy a 2GB module and add it to the existing one?

Thanks.

 

[NewMacbookPlz]

-4GB is the "max" although 6gb will work
-You can buy 2x2GB DDR3 modules for about $55-60 on newegg.com or ocw.com
-You'll need to buy 2 2BG modules, as the factory 2GB configuration is 2, 1GB modules.

 

[Eidorian]

http://support.apple.com/kb/HT1651

 

[tabasco70]

Thank you!