I have an existing Google Spreadsheet whose SUM and AVERAGE calculations are no longer giving the right results after several new columns were added. I need someone who feels at home in Google Sheets to trace where the ranges went out of sync, update the affected formulas, and verify that every total and sub-total now reflects the current data structure. The sheet is already shared in Drive; once you’re onboard I’ll grant edit access and point you to the tabs that need attention. Please keep the original layout intact, adjust only the formula logic, and double-check for hidden rows or filtered views that might throw the numbers off. Deliverable: a fully functional spreadsheet with all SUM and AVERAGE formulas corrected, plus a short note highlighting what was changed so I can follow the logic in the future.