Are you joking?
No.
My question is whether or not the range to be summed can exist on a
different plane than the range to be looked up.
The help file does not address this.
It says:
--------------
Sum_range are the actual cells to sum. The cells in sum_range are summed
only if their corresponding cells in range match the criteria. If sum_range
is omitted, the cells in range are summed.
---------------
As you can see, there is no mention about whether the 2 arrays can be on
different "planes", e.g. A1:A100 to look in, B10000:B10100 to sum up.
The example it uses is:
----------------
SUMIF(A1:A4,">160000",B1:B4) equals $63,000
----------------
Alex responded to the effect that omitting the 2nd range would make the
Sumif formula sum up the lookup range.
That has absolutely nothing to do with my original question.