Sum until the first negative amount

[thomas.mapua]

Hello all,

I am looking for a formula wherein: 1) Cell D9 shows a negative amount calculated from the sum of column range F until BG. The negative amount will be when the sum of columns first become negative and 2) Cell E9 will lookup the week # in Row 5 when the negative amount in 1) occurs. Please see attached worksheet. Formula in column E works but need it to be simpler and future proof (I don't want to keep on adding IF statements on it). Can't make column D work.

I was trying to use an index sum offset combo but I'm not sure how to do the sum until formula. Appreciate any help that can be provided.

Thanks!

[benishiryo]

hi there. try these array formulas. in cell D6:

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E6:

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...confirmed by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. You will know the array is active when you see curly braces { } appear around your formula. If you do not CTRL+SHIFT+ENTER you will get an error or a clearly incorrect answer.

copy down the formula

[thomas.mapua]

Benishiryo,

THANKS!!! It worked flawlessly.

Rainier