#### How do I add every few cells

```How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
cells such as B6 and B9 have other forumlas and info that is not to be
included).  I did this manually but the formula has now gotten so long that I
get an error saying "formula too long".  So I figured, there must be a
shorter formula that just adds every 3 (or whatever designated) cells
starting with one cell and ending with another.
```
 0
SusanK (6)
8/2/2005 8:22:02 PM
excel.misc 78881 articles. 5 followers.

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```Try this:

=SUMPRODUCT((MOD(ROW(B7:B500)-1,3)=0)*(B7:B500))
--
HTH,

RD
==============================================
Please keep all correspondence within the Group, so all may benefit!
==============================================

"SusanK" <SusanK@discussions.microsoft.com> wrote in message
news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
> How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
> cells such as B6 and B9 have other forumlas and info that is not to be
> included).  I did this manually but the formula has now gotten so long
that I
> get an error saying "formula too long".  So I figured, there must be a
> shorter formula that just adds every 3 (or whatever designated) cells
> starting with one cell and ending with another.

```
 0
ragdyer1 (4060)
8/2/2005 8:34:06 PM
```Try this Susan

=SUMPRODUCT((B7:B500)*(MOD(ROW(B7:B500)-ROW(B7),3)=0))

--
Regards Ron de Bruin
http://www.rondebruin.nl

"SusanK" <SusanK@discussions.microsoft.com> wrote in message news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
> How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
> cells such as B6 and B9 have other forumlas and info that is not to be
> included).  I did this manually but the formula has now gotten so long that I
> get an error saying "formula too long".  So I figured, there must be a
> shorter formula that just adds every 3 (or whatever designated) cells
> starting with one cell and ending with another.

```
 0
rondebruin (3790)
8/2/2005 8:37:40 PM
```I tried this and it said that it couldn't creat because of a circular
reference.  This formula I need provides me with a number that is used in a
formula for cells B8, B11,  etc.  Any other suggestions?  I'd really
appreciate it!!!

"RagDyer" wrote:

> Try this:
>
> =SUMPRODUCT((MOD(ROW(B7:B500)-1,3)=0)*(B7:B500))
> --
> HTH,
>
> RD
> ==============================================
> Please keep all correspondence within the Group, so all may benefit!
> ==============================================
>
>
>
> "SusanK" <SusanK@discussions.microsoft.com> wrote in message
> news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
> > How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
> > cells such as B6 and B9 have other forumlas and info that is not to be
> > included).  I did this manually but the formula has now gotten so long
> that I
> > get an error saying "formula too long".  So I figured, there must be a
> > shorter formula that just adds every 3 (or whatever designated) cells
> > starting with one cell and ending with another.
>
>
```
 0
SusanK (6)
8/2/2005 8:55:07 PM
```Ron, I got a message saying that it wouldn't work because of a circular
reference.  Cells like B8 and B11 have formulas that are based on the outcome
of this formula I'm tring to create.  Any possible suggestions?? It would be
much appreciated! - Thanks!

"Ron de Bruin" wrote:

> Try this Susan
>
> =SUMPRODUCT((B7:B500)*(MOD(ROW(B7:B500)-ROW(B7),3)=0))
>
> --
> Regards Ron de Bruin
> http://www.rondebruin.nl
>
>
> "SusanK" <SusanK@discussions.microsoft.com> wrote in message news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
> > How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
> > cells such as B6 and B9 have other forumlas and info that is not to be
> > included).  I did this manually but the formula has now gotten so long that I
> > get an error saying "formula too long".  So I figured, there must be a
> > shorter formula that just adds every 3 (or whatever designated) cells
> > starting with one cell and ending with another.
>
>
>
```
 0
SusanK (6)
8/2/2005 8:59:10 PM
```Then eliminate those 2 cells from the formula, and add them separately:

=SUMPRODUCT((MOD(ROW(B13:B500),3)=1)*(B13:B500))+B7+B10
--
HTH,

RD
==============================================
Please keep all correspondence within the Group, so all may benefit!
==============================================

"SusanK" <SusanK@discussions.microsoft.com> wrote in message
> I tried this and it said that it couldn't creat because of a circular
> reference.  This formula I need provides me with a number that is used in
a
> formula for cells B8, B11,  etc.  Any other suggestions?  I'd really
> appreciate it!!!
>
> "RagDyer" wrote:
>
> > Try this:
> >
> > =SUMPRODUCT((MOD(ROW(B7:B500)-1,3)=0)*(B7:B500))
> > --
> > HTH,
> >
> > RD
> > ==============================================
> > Please keep all correspondence within the Group, so all may benefit!
> > ==============================================
> >
> >
> >
> > "SusanK" <SusanK@discussions.microsoft.com> wrote in message
> > news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
> > > How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The
other
> > > cells such as B6 and B9 have other forumlas and info that is not to be
> > > included).  I did this manually but the formula has now gotten so long
> > that I
> > > get an error saying "formula too long".  So I figured, there must be a
> > > shorter formula that just adds every 3 (or whatever designated) cells
> > > starting with one cell and ending with another.
> >
> >

```
 0
ragdyer1 (4060)
8/2/2005 9:13:02 PM
```Glad you got it working
Thanks for your private mail Susan

--
Regards Ron de Bruin
http://www.rondebruin.nl

"SusanK" <SusanK@discussions.microsoft.com> wrote in message news:517768E3-D952-4A39-A92F-BA8BA7D7C655@microsoft.com...
> Ron, I got a message saying that it wouldn't work because of a circular
> reference.  Cells like B8 and B11 have formulas that are based on the outcome
> of this formula I'm tring to create.  Any possible suggestions?? It would be
> much appreciated! - Thanks!
>
> "Ron de Bruin" wrote:
>
>> Try this Susan
>>
>> =SUMPRODUCT((B7:B500)*(MOD(ROW(B7:B500)-ROW(B7),3)=0))
>>
>> --
>> Regards Ron de Bruin
>> http://www.rondebruin.nl
>>
>>
>> "SusanK" <SusanK@discussions.microsoft.com> wrote in message news:3D5718F9-76F0-4304-9B49-72E131662721@microsoft.com...
>> > How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
>> > cells such as B6 and B9 have other forumlas and info that is not to be
>> > included).  I did this manually but the formula has now gotten so long that I
>> > get an error saying "formula too long".  So I figured, there must be a
>> > shorter formula that just adds every 3 (or whatever designated) cells
>> > starting with one cell and ending with another.
>>
>>
>>

```
 0
rondebruin (3790)
8/2/2005 9:54:28 PM
```You could use a helper column and sumif function.  Put a character in the
helper column in each row you want to include in the sum.  If you put as s in
each applicable row of Col A, your formula would be =sumif
(a7:A500,"S",b7.b500)

"SusanK" wrote:

> How do I add cell B7, B10, B13 (every 3 cells up to 500+)? Note: The other
> cells such as B6 and B9 have other forumlas and info that is not to be
> included).  I did this manually but the formula has now gotten so long that I
> get an error saying "formula too long".  So I figured, there must be a
> shorter formula that just adds every 3 (or whatever designated) cells
> starting with one cell and ending with another.
```
 0
eider (13)
8/2/2005 10:27:02 PM

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