Thanks for the quick response Baden!
I know enough jQuery where I can usually reverse engineer something to work for myself and I've done a plugin or two, but very basic ones.
1. Values will be entered via radio buttons/drop downs so we can control their values.
2. Preferably would like to be able to do both, but email would be most important for now.
3. It can be calculated when the user hits submit. No need to constantly change/update.