license type : Unlimited Executions on 70 OO noeuds

Hi,

Under our OO environment we have the below license information (unlimited executions on 70 noeuds).

My questions are:

Is 70 the number of OO noeuds (Centrals + RASs) or it is the number of servers to target using OO ? 

How can we know the remaining number of noeuds since our license is on 70 noeuds ?

Thanks in advance.

Regards;