Billings
In simple, We bill you. and you bill your customers. There we are billing you based number of users under you. and you will bill your customers based on your price and their usage. This is automatic one, It works for you and bill your accountant companies under you. the direct customers who acquire subscription and use it. for the accountants. you need to bill them this way, and the system will make invoice for them here.
Note: It works for Resellers and Accountants. For dedicated resellers. It wont be billed like this way.