Default Enrollment Oppurtunity Fast Formula

It will be great if someone can share me the Default Enrollment Fast Formula which returns the plan and option along with Coverage amount (it can be previous coverage amount). Typically for Plan Drop and Add because of vendor change, we usually default them to the prior coverage amount to new plans.

I have come across these type of scenarios using default enrollment opportunity fast formulas in Oracle E Business. As i am not technically strong, looking for sample for Default Enrollment Oppurtunity Fast Formula which should returns the plan and option along with Coverage amount