I want to see profit or loss to a sales order. For example i have an order of total rs 1200 with delivery charges of 200, i have prepared invoice for rs 1200 and customer paid me. But while i am delivering products, the delivery charge would be more what i have expected let us say delivery charges rs 400.  Where i have to mention this extra rs 200. Where can i see wether i got profit or loss to this sales order?.