In sales orders, you can enter a cost at the line item level.  We are trying to figure out how to enter/manage/edit the cost for items on AR invoices.  For example, if you enter an invoice WITHOUTan associated sales order, how do you enter/manage/edit the cost of the item(s) on the invoice?  We don't see a cost field in the invoice_line_item table.  Has anyone run into/had a need for this?