I would like to subtotal one single column, the amount, every eight lines.
How can I sum of the column for every eight lines?

I'd use a helper column and put this in the top row of the data:

=INT((ROW(A1)-1)/8)

And drag down.

Then you can subtotal your data by that column.

You could also put:
x in the first 8 cells
y in the next 8 cells
then select those 16 cells and drag down the column to fill it with groups of 8
x's, then groups of 8 y's.

Then do subtotal by that column.

cbridge wrote:

I would like to subtotal one single column, the amount, every eight lines.
How can I sum of the column for every eight lines?

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Dave Peterson