"Sale Items" allow you to set prices and track sales for any item you're selling. Whether you attach a sale item to an invoice, sell it through a sign-up, or any other way, the item's settings are applied and allow you to track the quantity and dollar amount sold on a per-item basis.

Sale items are defined with the following:

Upfront Payment Options allow you to define how much of an item's price is due right away when the item is sold (as opposed to being paid on a payment plan).