General Question - Do calculated fields I make for a modified form get deleted if i delete that form? (RW)

Hi everyone, 

I've been working on an modified SOP Blank invoice form in Report Writer, and after some changes, I believe it's probably best to just start over from scratch. My conundrum is I've already made quite a few calculated fields for this form, and I want to make sure that they'll roll over and not be deleted when the form is. 

Thanks for the pointers in advance!