profit margin

:  a valuable return :  gain

:  the excess of returns over expenditure in a transaction or series of transactions

:  the excess of the selling price of goods over their cost

:  to be of service or advantage :  avail

:  to derive benefit :  gain

:  to make a profit

:  the part of a page or sheet outside the main body of printed or written matter

:  the outside limit and adjoining surface of something :  edge

:  a spare amount or measure or degree allowed or given for contingencies or special situations

:  to provide with an edging or border

:  to form a margin to :  border

:  to add margin to