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# Need Help with a formula

Posted on 2014-10-13
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Hello

the sum-product formula  needs one improvement, currently  it operates with the use of two helper columns. i want to the formula to be improved so that it operates without the need of helper columns or if there is any better way to achieve getting the same result .

thanks.
EE.xlsx
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Question by:ProfessorJimJam
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LVL 85

Expert Comment

ID: 40379304
Why do you think it will be better to not use the helper columns? In all likelihood it will simply require an extremely complicated formula that will be much harder to understand and maintain, and probably perform worse.
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LVL 26

Author Comment

ID: 40379333
Thank you Rory for your comment.

I would also prefer using helper columns, but in the worksheet that is heavily populated with formulas, i have no visible range space to keep the helper columns. i was thinking, whether it would be possible or not. i tried it myself but messed it up when combined them together.

if it would not be possible then i would have no option but to continue with the same structure.

thanks.
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LVL 85

Accepted Solution

Rory Archibald earned 500 total points
ID: 40379600
If you insist - in N2:

=SUMPRODUCT(--(SUM(M\$2:M2)>SUBTOTAL(109,OFFSET(\$C\$1,0,0,ROW(\$C\$1:\$C\$2)-MIN(ROW(\$C\$1:\$C\$2))+1))),SUM(M\$2:M2)-SUBTOTAL(109,OFFSET(\$C\$1,0,0,ROW(\$C\$1:\$C\$2)-MIN(ROW(\$C\$1:\$C\$2))+1)),SUBTOTAL(109,OFFSET(\$D\$2,ROW(\$D\$2:\$D\$3)-MIN(ROW(\$D\$2:\$D\$3)),0))-N(OFFSET(\$D\$1,ROW(\$D\$1:\$D\$2)-MIN(ROW(\$D\$1:\$D\$2)),0)))-SUM(N\$1:N1)

and copy down. I'm sure there are more compact formulas!
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LVL 26

Author Comment

ID: 40379683
Thank you very much Rory.

i changed some of the cell reference from absolute reference to mixed reference and it worked.

i do not think, there would be any other solution but the one you provided. because, my request on one of other forums were pending for months and nobody came up with any solution, except i got the message that it is impossible. so i had to ask the mod to delete the question. but finally here you got it right.  thanks a lot.  i am also a fan of your web excelmatters

=SUMPRODUCT(--(SUM(M\$2:M2)>SUBTOTAL(109,OFFSET(\$C\$1,0,0,ROW(\$C\$1:\$C2)-MIN(ROW(\$C\$1:\$C2))+1))),SUM(M\$2:M2)-SUBTOTAL(109,OFFSET(\$C\$1,0,0,ROW(\$C\$1:\$C2)-MIN(ROW(\$C\$1:\$C2))+1)),SUBTOTAL(109,OFFSET(\$D\$2,ROW(\$D\$2:\$D3)-MIN(ROW(\$D\$2:\$D3)),0))-N(OFFSET(\$D\$1,ROW(\$D\$1:\$D2)-MIN(ROW(\$D\$1:\$D2)),0)))-SUM(N\$1:N1)
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LVL 26

Author Closing Comment

ID: 40379690
you have a great intellect
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LVL 85

Expert Comment

ID: 40379762
Oh so it's you that reads it! :)
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LVL 26

Author Comment

ID: 40379860
:-)
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