Produce an estimate

I have a dozen ".fmb" files (maybe 30 screens or so) that are Oracle Forms source code developed in 2011 +/- 3 years.I need an estimate (in days/person) to do the following: For all screens For all fields Document the input parameter along with the required SQL statement (for Scalar fields and also repeated fields) in order to get the same information. Need the estimated effort (total days) for Beginner (1 year experience) With the estimated effort (total days) for a Guru (very strong programmer)