What is the purpose of the “manual price” property in an order?

In many organizations, all invoices must be reviewed before they are sent out. This is often a daily, time consuming task. But why check every invoice? With this solution you can manage by exception. If an order uses standard pricing only, there’s no need to check it. Using this functionality, lines are marked with the “manual price” checkmark when the user changed the price or discount. Orders containing any lines with this marking, are marked as “manual price” in the same way, and so are the invoices for them. This way, it becomes very simple to filter out and check only invoices with this mark