THE ABILITY TO HAVE THE BE BUTTON HIGHER

I WOULD LIKE THE ABILITY TO SET A PREDETERMINED AMOUNT LINKED TO THE BE BUTTON. DUE TO FEES BE IS NOT REALLY BE. IF I COULD SET A NUMBER IE $25, $50 OR $100, SO WHEN I CLICKED THE BE BUTTON IT PUT ME SLIGHTLY IN PROFIT THAT WOULD GIVE ME THE ABILITY TO ACCOUNT FOR THE FEES.