S
Sandy Mann
With your data in Sheet1 starting from A1 and the start date you want in
Sheet2 A1 put:
=DATE(YEAR(A1),MONTH(A1)+12,DAY(A1))
In B1
Then use the formula:
=SUMPRODUCT((Sheet1!A2:A106>=A1)*(Sheet1!A2:A106<B1)*Sheet1!C2:C106)
Adjust to suit your needs.
--
HTH
Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings
(e-mail address removed)
Replace @mailinator.com with @tiscali.co.uk
Sheet2 A1 put:
=DATE(YEAR(A1),MONTH(A1)+12,DAY(A1))
In B1
Then use the formula:
=SUMPRODUCT((Sheet1!A2:A106>=A1)*(Sheet1!A2:A106<B1)*Sheet1!C2:C106)
Adjust to suit your needs.
--
HTH
Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings
(e-mail address removed)
Replace @mailinator.com with @tiscali.co.uk