Backup Exec 2012: What and how many licenses I need

Hi All,

I have 3 Windows servers.  One server will be my Backup Exec server.  Another server is a SQL server and the last one will be a regular file server.  I want to backup all servers using Backup Exec?  How many licenses would I need with this kind of setup.  Also what type of licenses ( e.g. RAWS, RALUS, Application and Database ) do I need for this kind of setup?  I am planning to use Backup Exec 2012 in this scenario.