Counting duplicates in a calculated column

[danielco]

Hello,

I want to count occurences in the 'Count' column as shown on the attached image. First row is 2 because there are two "Jan" month and "A" entity on the same row.
I hope it's clear (english is not my mother tongue).

Thanks in advance.

Daniel

[rwfigtree]

=CALCULATE(COUNTROWS(Table1),FILTER(Table1,Table1[f1]=EARLIER(Table1[f1]) && Table1[f2]=EARLIER(Table1[f2])))