Hi,

I have cells that had to be figures because they are used in another
cells calculation. How can I restrict user from putting words/letters
or null into it. Formulas is ok.

I have tried Validation, but can't make it suit the case. I need to
allow -500%, 0%, 500%, "=50%*50%" but forbid "A", "", " ", "-" etc a
user could think of and would ruin the other cells formula.

Validation seem not to support this. Anyone could lend me a brain, or
perhaps give an idea?

/Regards
Tskogstrom