Getting Count from the lookup table

Hi ,

I wanted to get the number of record from the lookup table.

Scenario;

If lookup table 1 has A then need to count the number of records from the lookup table 2 and get it in target table.

Target table has some other field with some other source just for one field I need this count.

Lookup table 2 -Field1  I have in my source table.

Lookup table 1:

Lookup table 2:

Target table:

Thanks !

-Amit