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

### Instruction:
What is the total attendance at games against the New York Mets with a record of 18-18?

### Inputs:
table_name: table, columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']

### Response:
SELECT COUNT Attendance FROM table WHERE Opponent = new york mets AND Record = 18-18