Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE invoices ( billing_country VARCHAR, total INTEGER )

### Question ###
A list of the top 8 countries by gross/total invoice size. List country name and gross invoice size.

### Accurate SQL ###

SELECT billing_country, SUM(total) FROM invoices GROUP BY billing_country ORDER BY SUM(total) DESC LIMIT 8