Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the total when the B Score was 9.15 for Cheng Fei ( chn )?

### Inputs:
table_name: table, columns: ['Position', 'Gymnast', 'A Score', 'B Score', 'Total']

### Response:
SELECT AVG Total FROM table WHERE B Score = 9.15 AND Gymnast = cheng fei ( chn )