I have a spreadsheet that contains vendor information for our
different locations. In column B have the vendor P/N listed and in
column A we have our P/N's listed for each vendor P/N. We have
different P/N's that have the same vendor P/N. I need to find out
where the vendor number is the same in column B and the P/N's are
different in column A. Here is an example of what I'm talking about.
The vendor P/Ns in cells B2 & B3 are the same, but our P/N's in cells
A2 & A3 are different. I have about 3,000 entries to go through.

A B
1 Our P/N Vend P/N
2 365181 11003
3 518136 11003
4 119706 11007
5 706119 11007
6 76873 13005
7 73768 13005
8 119546 23114
9 645911 23114
10 357501 27518
11 357501 27518
12 100722 27685
13 357587 27685
14 122690 27714
15 122690 27714
16 137710 28655
17 137710 28655