How can I easily calculate fields that contain text?

I have multiple fields to add up and the selection contains text (ex:"Not Riding") to guide them since there are multiple selections.   Then I have other fields that will be added or subtracted from that fields to get a final total. The text may be hindering the calculation but I'm not sure how to get them calculated without redesigning the entire form. HELP!

 I'm sure if I posted this or not so forgive me if this is a duplicate ;-/

No worries, I see that this is indeed a duplicate. My colleague is already assigned on the other thread you posted earlier. Here it is: https://www.jotform.com/answers/1054196. Please refer to that one instead. She will answer it shortly.

Thank you.