RedHat Subscription Quantity versus System Attached

Dear Red Hat Community,

I am confuse about Red Hat subscription types and concepts regarding its usage.

I have some a system with HOST and GUEST where it is confuse Red Hat License as:

Red Hat Enterprise Linux Server, Premium (1-2 sockets) (Up to 4 guests) - Embedded Partner Support

After subscriber and attach I see:

I cannot understand the concept of Quantity and System Attached, to be sure the bought quantity is all right.

Some of these systems I have are physical, where some are the HOST, and the vast majority are GUEST, or in general I have 3 GUEST per HOST.

Then I cannot be sure if the license I have allows on the same license both HOST and GUEST, reason I have System Attached larger than Quantity bought.

I would like to ask Red Hat community if someone can clarify some doubts I have like:

1) Would a license I reported as quantity 56 allow both HOST and GUEST be related to the same license, like 1 quantity allows 1 Physical, or HOST and/or 4 GUEST?
2) On the reported license, what means quantity against system attached?
3) Based on that, can I add more systems since now they are all Virtual?

Your comments are very welcome.