Formulas locations

Hi folks.
I am trying to get a sumifs to work. Do formulas have to be in the form or can they be in the listing too? And do they need to be at the bottom of the sheet under the records or can they be at the side?
Thank you for any info.


You could try field description and bbcode with formula to add formula in listing page, it could be at the side and at the bottom.

OK thankyou