In Billing Premier, you'll notice that you have the option to create Invoices AND Statements.
What's an Invoice?
An invoice is what you'll want to create if you have new charges to add to the customer's account. For example, you'll want to create an invoice for membership dues, cart fees, locker fees, etc.
What's a Statement?
A statement is simply a history of the customer's account for a selected period of time. No new charges, just a history of what the customer spent and what they owe for the selected period.