I am looking for something like Mail-Merge in Libre-office Calc Spreadsheet. I cannot use the same thing with “Writer” because I need some calculations on the data coming from data-source (also a spread sheet), for each client, before printing.
No; but couldn’t you calculate it all in the source spreadsheet used as the data source?
Hmm, it may be a fix for now; but yet I expect something like that.