How do I process payments/fees with Agents?

If the Agent is taking payment directly from the customer, using the Line-Up API, then follow these steps:

Create a Custom Payment Method, e.g. Agent Invoice for the Agent to use. This will pull through on Line-Up orders and reports.
To receive the payment from the Agent, you'll need to invoice them, using a Report for to work out fees/commissions.
When they pay you, they'll need to deduct the commission, i.e. the Adjuster fee you will have created and enabled their Channel for.

Would you like the Agent to use Line-Up Box Office to process Customer payments? Go here for more info on this.