DocBrown;487185 Wrote:
- for each row in Tbl1, if item A is "" or isn't in tbl2 then add B
value to the sum.
This formula might do this bit - but CHECK - I haven't thoroughly
checked it.

=SUMPRODUCT(--(NOT(COUNTIF($E$1:$E$15,$A$1:$A$15)0)),$B$1:$B$15 )

DocBrown;487185 Wrote:
- for each row in tbl1, if item A is found in tbl2 but F is "" then add
B value. Confirm that if there is more than one item A in tbl1 you want to add
all their values. This would arise if instead of $300 for item 100 in
tbl2 you had "". There are 2 values for item 100 in tbl1 ($100 and $25);
add them both?


--
p45cal

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