Hi Duane,

Thank you for reply. I've tried the solution below, but do not get the
expected answer. Not sure why?

=SUMPRODUCT((A1:A10=50)*(MOD(ROW(A1:A10)-1,3)=0)*(A1:A10))

Cheers,
Sam

duane wrote:
if I read your question right you want to sum the occurances of 50, but only
those in every 3rd row.

So, for the range of a1:a10, summing those 50's in rows 1,4,7,10

=SUMPRODUCT((A1:A10=50)*(MOD(ROW(A1:A10)-1,3)=0)*(A1:A10))

you could refer to cells with the values of 50 and 3 in the formula if
desired vs the hard coding of the values in the formula

Hi All,

[quoted text clipped - 6 lines]
Cheers,
Sam

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