I believe the OCC program you are referring to is to verify information more than calculate it.
You may want to check out APRSystems if the OCC software is not what you wanted. I don't know that APR Systems has what you want, but if it isn't there, ask.
------------------
Andy Zavoina
Opinions stated are not necessarily that of my employer.
[This message has been edited by Andy Z (edited 01-31-2001).]