Hi I need a formula that will count only duplicate occurances in a list as per the example shown.
Thanks in advance
JD
Example of desired outcome
Col A Col B
21
1
2
3
4
5
6
7
10 1
10 2
10 3
17
20
25
26 1
29 1
32
8
9
13
16
18
33
34
35
36
37
38
39
40
14
15
19
22 1
22 2
22 3
26 2
28
29 2
31
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