Good morning --

I'm setting up a workbook for several users, in which they will gradually
add data over the months and years ahead. I want to set it up to compare the
current month's ratios to the maxima and minima over the four years' worth
they'll eventually have. In the meantime, I need to figure out how to get
the CSE formula to disregard the cells that aren't filled in yet. Here's an
example:

A B
1 (blank) (blank)
2 1 5
3 2 4
4 3 3
5 4 2
6 5 1

I'd like a formula a la
{=min(b1:b6/a1:a6)}

Is there something I can put in the $1:$1 row to get the CSE formula to
disregard it until filled? Or is there some kind of =IF() statement I can
use inside the CSE formula?

TIA