How to sum a variable number of items

[RobinC]

How do I sum the first X cells in a list where X is defined in another cell?

Specifically, I have a list of numbers in cells B4:B30.

In cell A1, I have another number, which I want to be able to change around.
So that if A1=4, then I sum B4:B8, but if A1=5, then I sum B4:B9 and so on.

 

[Peo Sjoblom]

One way

=SUM(B4:INDEX(B4:B30,A1))


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Regards,


Peo Sjoblom

 

[Stefi]

=SUM(OFFSET(B4,0,0,A1,1))

Regards,
Stefi

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