Try this:

.................A..............B..........C...... ...D
1...........mar.............100..................m ay
2...........april............200
3...........may............300
4...........june............400

D1 = some month

=SUM(B1:INDEX(B1:B4,MATCH(D1,A1:A4,0)))

Biff

"bubble" wrote in message
...
i would like to be able to sum the following according to column A's value

mar 100
april 200
may 300
june 400

if i have a cell that has may, i would like another cell to add up
anything
from before, example, may will be 600, april will be 300, and june will be
1000.

Thank you.