On May 12, 3:11*pm, "Clif McIrvin" wrote:
"joeu2004" wrote in message
However, you still need to answer a critical question: *when is it
necessary to recompute I50:I53?
[....]
"Cimjet" wrote in message
[....]
I am guessing only when $B$6:$AF$17, $B$21:$AF$32 and
$B$36:$AF$47 are edited. *Right?
The answer is "Yes

Thanks, Clif. "Couldn't see the forest for the trees" ;-). My bad!