Converting .ods (OpenOffice) to Excel format

Hello

I have an old file that I created in OpenOffice in .ods format and I need to convert to an Excel or Numbers file so I can use it.

Open Office and Neo Office used to be good, free programs, but now with the free version you can't save files ⚠. I don't want to pay $30 just to use this one file and I don't want to give any money to companies that do things like this.

Any suggestions for free .ods -> .xls software for the Mac OS?

Thanks!