Novell License Transfers to other server

I have a new server and will be bring in to my tree with 3 other servers. I will move the 300 users from the 3 servers to the new server and not use the old servers. How can I move the licenses from the old servers to the new? All I see in NDS are number references like SN:30043409 etc. How are these interpeted, in fact, how can you tell the number of licenses you have?

Thanks in advance…