Calc is the spreadsheet component in LibreOffice.

If you save the spreadsheet as an xls file (Microsoft) ensure it supports the range used else data could be lost.

If custom macros are used ensure they are saved with the document and not just the local LibreOffice installation (see link below).

Local macros are stored at ~/.config/libreoffice/<version>/user/basic

LibreOffice - User Defined Functions (macros)

Macro to access cells by sheet, column, row number