I am new to excel, doing the tutorial thing, but i am having a problem
with a worksheet i want to massage.
It goes something like this:

ColumnA Column B Column C Column D
abba A 0 0.15
abba B 1 2
abba C 0 0.14
abba D 0 3
abba E 1 0.2
acca A 0 1
acca B 0 3
acca C 0 .2
acca D 1 2
acca E 1 66

What i need to do is if Column B is 1 then I need excel to ouput the
value in Column C for ALL occurence of Column A. That is Since the
First B has a value of 1 and the second b does not I need excel to
output all of the column C values for B in different cells, i.e For B:
abba:2, acca:3. For A, however, with two 0's I don't want it out.