FFE profit and fees.

It would be good to be able to make a private note or track somehow the profit on FFE so that an additional spreadsheet isn't required. The price information is all set out in invoices, but currently I am having to duplicate all of this separately to make a note of the FFE profits. This would be so helpful for accounting, and for when trade discounts have been shared with a client, or if there any extra fees to pay on the FFE profit to an agency for example.