user: Question: What is the highest total of Player damon gray, with a Challenge Cup less than 0?
Columns: ['Player', 'League', 'Scottish Cup', 'League Cup', 'Challenge Cup', 'Total']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Liam Buchanan', 11.0, 3.0, 0.0, 0.0, 14.0]
SQL:

assistant: SELECT MAX("Total") FROM "Table" WHERE "Player" = 'damon gray' AND "Challenge Cup" < 0.0;