Hi PatriotO'Grady ,
I'm Mukesh and I will be happy to help you out with your question.
Can you share the errors for better understanding?
The most common reason for an Excel formula not calculating is that you have inadvertently activated the Show Formulas mode in a worksheet.
This guide will walk you through all possible causes and help you in identifying the issues. Excel formulas not working, not updating, not calculating: fixes & Solutions https://www.ablebits.com/office-addins-blog/2016/02/03/excel-formulas-not-working/
'Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.'
I hope this information helps. If you have any questions please let me know and I will be glad to help you out.
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Regards
Mukesh