Trying to send a  with webform I have a Webform that does some calculations (javascript) based on user selections, which i would like to send along with the user-selectable fields to a user's email.

Is it possible to append these div's to the HTML email along with the fields?
You could add a regular webform field to capture the calculation result, filling it via Javascript.
Then you hide the field via CSS.

Storing a bunch of html has a security risk though.