I'd like to learn how to use spreadsheets but don't know which software to use. I see that I can download Open Office for free or would it be best to purchase a copy of Excel?
Thanks alot.

open office would be just fine

open office works much the same as its micosoft counterpart however if you want to get advanced purchase exel

Yep ... Excel is the Industry recognised package, so if you are learning to help in employment, this is the way to go.
Not many companies will be impressed at an interview, if you say you have experience in Open Office

Thanks very much for your help :)