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

### Instruction:
What is the sum of Position, when Points 1 is greater than 23, and when Goals For is "77"?

### Inputs:
table_name: table, columns: ['Position', 'Team', 'Played', 'Drawn', 'Lost', 'Goals For', 'Goals Against', 'Goal Difference', 'Points 1']

### Response:
SELECT SUM Position FROM table WHERE Points 1 > 23 AND Goals For = 77