About zoho create "Customers"

About zoho create "Customers"

"Customers: The persons who can access the information on the Customer Portal. They are usually your customers, vendors or re-sellers."
I try to create 2 agent manage applications on zoho create, 1 have 8 users, and the other have 10 users, then have more then 120 agents(re-sellers) will use the system.
So, if i register as a  Enterprise plan, shall be 8+10 x 15 dollars for every month, but what about the 120 agents? shall pay as user or they are just customers? if they are customers can access the information, do they can add/edit data on software?
Thank you
Jeff