>Michelle,
>
>Would it work to make the grid based of a view and have the view column be your calculation? In that manner the data would be correct when it grid saw it and you would be able to have the check box funtion as expected.
>
>Just a thought.

That's a good idea. I'm not sure if I could make a view with such an odd calculation, but it's worth a try...

Thanks,

-Michelle