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

### Instruction:
What is the total of win percentages when the year is 2008 and the crew is varsity 8+?

### Inputs:
table_name: table, columns: ['Year', 'Coach', 'Crew', 'Record', 'Win %']

### Response:
SELECT SUM Win % FROM table WHERE Year = 2008 AND Crew = varsity 8+