user: Question: What's the sum of all average yards gained when the gained yards is under 1276 and lost more than 3 yards?
Columns: ['Name', 'Gain', 'Loss', 'Long', 'Avg/G']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Darren Sproles', 1517.0, 52.0, 80.0, 112.7]
SQL:

assistant: SELECT SUM("Avg/G") FROM "Table" WHERE "Gain" < 1276.0 AND "Loss" > 3.0;