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

### Instruction:
Tell me the sum of cap/hor for double chair and vertical less than 479

### Inputs:
table_name: table, columns: ['Lift Name', 'Type', 'Length', 'Vertical', 'Cap./Hour']

### Response:
SELECT SUM Cap./Hour FROM table WHERE Type = double chair AND Vertical < 479