Upgrading.
Happy New Year to everyone.
I rely on Microsoft EXCEL spreadsheets to do my personal accounts. At the moment I'm on macOS Mojave and my question is, if I upgrade to a later, or the latest OS, will my Excel app. still work? I know that I should keep updated but I do need the spreadsheets.
Would I have to upgrade the Excel and, if so, will it cost a lot to do so?
Thank you.
iMac 27″, macOS 10.14