perl_new_b:

If you can't use office, then you'll have to use something like Spreadsheet::XLSX to read the spreadsheet, and Excel::Writer::XLSX to write the new one. If you're wanting to copy formatting, etc., then it can be a bit tedious, but once you have the hang of it, it's pretty simple.

...roboticus

When your only tool is a hammer, all problems look like your thumb.