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

### Instruction:
What is the sum of League Goals, when Position is "DF", when League Cup Apps is "0", when Total Apps is "7", and when FLT Goals is less than 0?

### Inputs:
table_name: table, columns: ['Squad No.', 'Name', 'Position', 'League Apps', 'League Goals', 'FA Cup Apps', 'FA Cup Goals', 'League Cup Apps', 'League Cup Goals', 'FLT Apps', 'FLT Goals', 'Total Apps', 'Total Goals']

### Response:
SELECT SUM League Goals FROM table WHERE Position = df AND League Cup Apps = 0 AND Total Apps = 7 AND FLT Goals < 0