You are using a calculated column COUNTS within your Dimension Calculation View and an aggregation node.

You are using a calculated column COUNTS within your Dimension Calculation View and an aggregation node.

This is the data that goes into the aggregation node:
A . AT Vienna 11
AT Vienna 15
DE Berlin 13
DE Berlin 13
B . AT Vienna 11
AT Vienna 15
DE Berlin 13
C . AT Vienna 26
DE Berlin 26
D . AT Vienna 11
DE Berlin 13

Answer: D