user: Question: How many copies were sold of the game released on October 23, 2008?
Columns: ['Title', 'Total copies sold', 'Sales breakdown', 'Genre', 'Release date', 'Developer', 'Publisher']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['New Super Mario Bros.', '30.38 million', 'N/A', 'Platform game', 'May 15, 2006', 'Nintendo EAD (Group 4)', 'Nintendo']
SQL:

assistant: SELECT "Total copies sold" FROM "Table" WHERE "Release date" = 'October 23, 2008';