Thnaks for your help! This worked great.

"KC Rippstein" wrote:

=SUMPRODUCT((S1:S10TODAY()-365)*(S1:S10<=TODAY())*(K1:K10))
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"DB74" wrote:

I have a list of revenue by dates (mmyy) and want to have a function that
will calculate my revenue for the last 12 months as of today. Can anyone
help with the syntax of this function? My dates are in column S and my
revenue figures are in column K.

Thanks for your help!