user: Question: What is the total when the B Score was 9.15 for cheng fei ( chn )?
Columns: ['Position', 'Gymnast', 'A Score', 'B Score', 'Total']
Types: ['real', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Cheng Fei ( CHN )', 6.6, 9.15, 15.75]
SQL:

assistant: SELECT "Total" FROM "Table" WHERE "B Score" = 9.15 AND "Gymnast" = 'cheng fei ( chn )';