formula to sum columns based a value in a given column

Hi Experts (excel 2007)

I need a sum formula to sum across the data in a set number of columns based on what number i enter in column U

So if i enter in column u 4 then >

starting at column 6C (always) sum columns 6C:6F and enter result in column P

So if i enter in Column u 7 then>

Staring at column 6C (always) sum Columns 6C:6I etc....
route217JuniorAsked:
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[ fanpages ]IT Services ConsultantCommented:
Hi,

Sorry, how does a value of 4 (or 7) relate to the specific starting columns/rows you have stated?

Also, where is 4 entered in column U?  Which row?

BFN,

fp.
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route217JuniorAuthor Commented:
apologies fp

Assume 4 is entered in row 7 column U

and then we want to sum up the data in column C7:F7...
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[ fanpages ]IT Services ConsultantCommented:
OK, thanks.

So, with a value of 4 in cell [U7], you wish to total the range [C7:F7] (4 cells), & place the result in, I'm guessing, cell [P7].

...and with a value of 7 in cell [U7], you wish to total the range [C7:I7) (7 cells).

Here is one method...

Please enter this formula in cell [P7]:
=SUM(INDIRECT("C7:"&ADDRESS(7,3+U7-1)))

Obviously, if you enter a value of 14 or over in cell [U7] then you will find a 'circular reference' error.

I have attached a working example.

BFN,

fp.
Q-28244877.xls
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route217JuniorAuthor Commented:
thanks for the feedack fp
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[ fanpages ]IT Services ConsultantCommented:
You're welcome.
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Rgonzo1971Commented:
Hi,

To be able to use the formula in different rows
pls use

=SUM(INDIRECT("R"&ROW(P6)&"C"&3&":"&"R"&ROW(P6)&"C"&2+P6,FALSE))

Regards
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[ fanpages ]IT Services ConsultantCommented:
...or, place this formula in cell [U7]:
=SUM(INDIRECT(ADDRESS(ROW(),3)&":"&ADDRESS(ROW(),3+U7-1)))

...and copy down column [ U ] to any other row.
Q-28244877b.xls
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