Stuart wrote:

Thanks, but I think the chance to Round has passed by the time
the value hits the Sum cell.
I guess I need to find a way to Round each calculation BEFORE
its' result is added to the Sum....if you see what I mean.

Sorry Stuart,

round globally the product this way

.....formularray = SUM(ROUND(array1*array2;roundoff))

Choose the round off you desire.

I tested this formula manually in a worksheeet and Excel allows it.

Let us know.

Alex.