If your data in is cells A1:B11, try this:
c1: =SUMPRODUCT(MAX(--(A2:A10=100)*(B2:B10)))

Does that help?

€¢€¢€¢€¢€¢€¢€¢€¢€¢€¢
Regards,
Ron


"eoht" wrote:

I have 2 columns of data; my item number and amount of quantity reserved. I
want to be able to get the max of a quantity reserved by looking up the item
number. For example, I want to find out the max on Quantity for Item #100 =
10.

Item # Quantity
101 5
100 10
102 4
100 8
102 9
101 11