We are preparing to launch a web form that will be accessible to the public. Wondering if LF Forms can accomplish the following:

1. For the most part, form submissions will be completed by individuals that are not known to us until they complete the form. There is a sub-set of users that are known to us. We would like to send out an ID # and PIN by mail so that these users can log in to the form and see some of the fields pre-populated with information that is unique to them.

2. Take the value of fields X, Y, and Z and display the result of a formula (say X * Y + Z).

Thanks!