What I need to do is build a list of items, but seperated with
commas..

So..I have built this file to have a Brand, Model, Part criteria.
There is 53k or so entries or rows.

What I need to do is.. Sort each Part Number probably around 1200
Parts which will show me each Brand that takes that part in a list. I
need some sort of automation to create this list of Brands, but have
them seperated by commas.. For example..

These Part Numbers in Column C fit These Models in B and Brands in
Column A
Col-C P/N Col-B Model number Col-A Brand
1683 A altima
1683 B altima
1683 C altima
1683 D altima
1683 E snoma
1683 F snoma
1683 G snoma
1683 H snoma
1683 I tscny

As you can see there is some redundancy in the Brand Column on this
Part number.
What I need to do is have a final ouptut in a new colum look like
this.. 1683,altima,snoma,tscny


Any ideas on how to achieve this? I think Excel can handle it, but
I'm not sure. Please advise.