My apologies for the delay in getting back to you Mark.. I was able to open the spreadsheet without issues using Gnumeric ( a free a simple spreadsheet program)
You can download Gnumeric from here, and then copy over the data you need..https://www.flyn.org/apple/
Gnumeric is just a bit down the page.. That being said, I havent been able to save it successfully with gnumeric, it keeps encountering an error.. ( hence why I mentioned moving the data over )
You mentioned you had to go to sleep in a bit as its late your time.. It may be best if you contact me again in the morning, when ive had time to try and open and save the file with a few other programs..
To get back to me, you would go back to justanswer.com, and login to your account, and then click my questions at the top right of the screen.
Then click on the title of this question , and you should be able to reply at the bottom of the question page..
I suppose I will be hearing from you tommorow, and in the meantime I will work on opening and trying to save the program for you..