Licensing Agent for Apps & DBs

Hi!

I would like to confirm how many licences should my customer have to buy for the following:

- Server 1: File Services, Active Directory

- Server 2: File Services, SQL (Production), Sharepoint (Proiduction)

- Server 3: SQL (Development)

- Server 4: SQL (New server) (Production)

- Server 5: Media Server / SEP 

They have:

01 Media Server

01 RAWS

02 Agent for APP & DBs.

I think they are missing one or two Agent for apps and dbs. Is it necessary for Server 2 to have two of those agents (because it is running SQL AND Sharepoint)?

Thanks,

Marco