This is the most basic scenario.  You invoice the customer once for all of the charges and the customer pays the invoice.  For example, you could charge the event client for all event charges, or an attendee for all of his or her registrations, accommodation, travel and requirement expenses.  Remember that the person billed is often determined by the selection made in the Bill To drop-down list for the item (Not Billable, Event Client, Attendee, Attendee Group, Exhibitor, etc.).

In the Invoice Wizard, select Create an Invoice Automatically from all chargeable items.  If you do not change any of the options, EventPro Planner will create one invoice for 100% of all items.

When the Customer pays, you will select Regular Payment from the Payment Wizard.  EventPro Planner will, by default, apply the entire payment to the one existing invoice.