For a shipment that requires a single entry bond, have a place in entry for entry writer to refer to that calculates what the SEB bond amount should be

I would like to request a field be added when a single entry bond is required that tells the user what the bond amount should be when they apply for the single entry bond. Using Value + Duty - rounded up, And when PGA applies Value + Duty x 3. Our old system Editrade has a feature like this as per the attached . Thank you