Batch Total of numbers between end of batch flags

I have a spreadsheet with 2 columns. No and Flag. The No column is a series of numbers which I need to count in batchs. The Flag columns denotes the end of a batch with a -1 the rest of the time the flag is 0. I need to total the numbers corresponding to the zero's and the -1 then the zero's to the next -1 this list may be 20 rows long or 65000 rows long. The -1 will not always be evenly spaced. But the zeros and the next -1 determine a batch. The series can start on on a -1 or 0 depending on when the data snapshot is taken.

I dont care if the count is incremental for the batch but must restart the count on the next zero after the -1. IE if the first matching number and 0 flag is 11 then the count is 11.

I have attached a spreadsheet with some sample data. I dont have time to muck around working this out and will be solving a more complex issue. I would prefer output example 1 but can work with output example 2 in the sample spreadsheet. I have saved the sample data spreadsheet in 97-2003 format but am using 2010 if that helps.

Thanks for your help in advance.
SampleData.xls
IT SSMAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

[ fanpages ]IT Services ConsultantCommented:
Hi,

Add this formula to cell [C2]:
=A2

Then add this formula to cell [C3]:
=IF(B2=-1,A3,A3+C2)

Now, copy cell [C3] & copy down column [C] to the extent of your data (in the case of your sample workbook, cell [C17]).

This results in your "Example Output 2".

Now, the "clever" bit...

I have added Conditional Formatting to column [C], so that if the corresponding entry in column [ B ] is 0, the colo(u)r of the text in column [C] is changed to white.

This now represents your "Example Output 1".

I have updated your workbook, as attached.

Select all of column [C] to see the original formulae.

BFN,

fp.
Q-28248947.xls
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
IT SSMAuthor Commented:
Mate thanks for this simple and does exactely what  I want cheers for the quick help.
0
[ fanpages ]IT Services ConsultantCommented:
You're very welcome.

Good luck with the rest of your project.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Excel

From novice to tech pro — start learning today.