Hi

Im trying to work out what formula i can use to sum the figures in row 4
upto and including the specified month in cell b1 and display the result in
b6.

a b c d e f
1 month apr-08
2
3 jan-08 feb-08 mar-08 apr-08 may-08 june-08
4 100 100 150 600 680 265
5
6 YTD 950

eg if cell b1=apr-08 then cell b6 should = 950 (sum(a4:d4))
if cell b1=mar-08 then cell b6 should = 350 (sum(a4:c4))

I have assumed i will need to use some sort of LOOKUP formula to find b1 in
row 3 but once i have established that part i cant work out the formula to
sum row4 upto the selected cell.

Any help would be gretly appreciated

--
Regards
Colin