Exchange Product Types: Invoices
The Invoices Add-on for Exchange allows you to send invoices to clients and customers directly from your site.
Once installed, you will see Add Invoice in your Exchange Menu (or just Add Product if Invoices is the only product type you have enabled).
You'll start by setting a title and price for your Invoice.
Next, you will select the client you'd like to assign to the invoice. You can either select a current customer or create a new customer.