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

### Instruction:
What is the average Points For when there are Points Against more than 780, and Points smaller than 0?

### Inputs:
table_name: table, columns: ['Club', 'Wins', 'Losses', 'Points For', 'Points Against', 'Percentage', 'Points']

### Response:
SELECT AVG Points For FROM table WHERE Points Against > 780 AND Points < 0