Process by which the Netsuite calculates the consolidated exchange rates
In case of multiple subsidiaries, Consolidated exchange rate is the multiple of consolidated exchange rate between each subsidiaries for the specific time period.

Based on the example mentioned above while selecting the from(Germany) and to subsidiaries(US)the NetSuite by default generate the output after multiplication of consolidated exchange rate between the subsidiaries.
Also In consolidated exchange rate each rate type and it implication are mentioned below:
Current – for all balance sheet accounts other than equity accounts
Average – for all income statement accounts
Historical – for all equity accounts