Say I have the following data; in D, I want to sum values
in B if corresponding values in C=Y. The value in A serves
to visually "group" the data in B,C & D; meaning, data samples
"1" (A1) uses B1-D3, data samples 2 (A4) uses B4-D5. Simple
enough...

A B C D
1 1 1 Y
2 1 N
3 1 Y sumif($C1:$C3, "=Y", $B1:$B3), D=2
(Copy and paste 3 rows above, but only use 2 rows
for next data)
4 2 1 N
5 1 Y sumif($C3:$C5, "=Y", $B3:$B5); D=1

The problem is, as illustrated, the copied/pasted formula
on D5 starts in C3, since the orig. formula handled 3 rows.
I want it to start in C4.

Any clever way to handle this copy/paste to automatically adjust
the rows I want to relate it to?

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