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

### Instruction:
How much is the total ERP W for an 107.9 fm freqeuncy MHz?

### Inputs:
table_name: table, columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'Class', 'FCC info']

### Response:
SELECT COUNT ERP W FROM table WHERE Frequency MHz = 107.9 fm