How do I get customer cost metrics aggregated at the country level？

[jia Jimmy]

I'm tried with `geographic_view` [geographic_view](https://developers.google.com/google-ads/api/fields/v3/geographic_view) to get acustomer's cost group by country.

As below query showed:

query = """
                SELECT
                     customer.descriptive_name,
                     customer.id,
                     metrics.cost_micros,
                     geographic_view.country_criterion_id,
                     segments.geo_target_state
                FROM
                      geographic_view
                WHERE
                     segments.date BETWEEN '{}' AND '{}'

            """.format("2020-06-01","2020-06-17")

Then I got multiple results with different `geoTargetConstants` which belonged to same country. After I group those by same country. I found there are some country costed not appeared with GAQL as I could find at my google manage backend.Also the sum cost with all these country  didn't meet the cost I  request singlely

query_cost_only = """
                SELECT
                     customer.descriptive_name,
                     customer.id,
                     metrics.cost_micros
                FROM
                      customer
                WHERE
                     segments.date BETWEEN '{}' AND '{}'

            """.format("2020-06-01","2020-06-17")

Can you give me some advice about these?

Thanks.