I am using the following logical formula in Excel 7 :

=IF(OR(B670,A570,a57=),$B$88,0)

I only want to return the value in B88 if B67 or A57 is greater than zero. I
assumed that Excel would interpret text as not greater than 0. I was wrong.
Excel is interpreting text in A57 as greater than any value that I assign.
Can someone give me a workaround for this ?

Thanks !