Defaulting Value while elections are being made in the Post Enrollment Calculation formula in Fusion

Team -

My client has current functionality in a Fast Formula in OAB in EBS R12 in a Coverage Amount Calculation formula.  They are looking for the same functionality in Fusion Benefits.  The current formula looks at the election made by the employee into Voluntary Life, and when the employee elects (checks) Voluntary AD&D, it is defaulting the amount from Voluntary Life into the Voluntary AD&D field.

In fusion we are using a the same Coverage Amount Calculation formula.  We are also using a Post Election edit rule in Fusion Benefits.  If the employee elects Voluntary Life, then elects Vol AD&D, the post election formula is returning an error if the amounts do not match....