I am working in sheet 3 and want to look up all items that match column b on
sheet 1 and then sum up column c on sheet a and return that value in sheet 3
Here is a sample
Sheet 3

A B C
400 (look up all 400s(B) on sheet 1 and return the sum of all the
values in col C)
1000
1200
--
Kind Regards,
Bobby