This is an Apache OpenOffice .ods file which is just a zip file but with .ods extension. If extension is changed to .zip it can be treated as normal zip file. Something went wrong when turning off my pc, the file got damaged, OpenOffice does not recognize it anymore. I tried to repair it as a zip file in WinRAR, but no luck. So I am looking for a zip file specialist who can repair this. I can send the file to you in a message so you can check if you can fix it before you do a bid and before I assign the job to you.