How to Sum Numbers Across Different Tables in LibreOffice Writer

LibreOffice Writer can handle some of the very basic tools that are part of Calc (the LibreOffice version of Microsoft Excel) with its Table function. For example, to sum up the contents of multiple cells and place the total in a new cell, you use the exact same formula, “=sum<[cellstart]:[cellfinish]>.

via: howtogeek.com