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

### Instruction:
What is the total GNIS Feature ID with a County of idaho?

### Inputs:
table_name: table, columns: ['Name', 'GNIS Feature ID', 'State', 'County', 'Type', "USGS 7.5' Map"]

### Response:
SELECT SUM GNIS Feature ID FROM table WHERE County = idaho