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

### Instruction:
Tell me the sum of longitude for diameter being 22.6 and latitude less than -12.4

### Inputs:
table_name: table, columns: ['Name', 'Latitude', 'Longitude', 'Diameter (km)', 'Named after']

### Response:
SELECT SUM Longitude FROM table WHERE Diameter (km) = 22.6 AND Latitude < -12.4