user: Question: What is the total number of 3-dart average when legs lost is larger than 41, and played is larger than 7?
Columns: ['Player', 'Played', 'Legs Won', 'Legs Lost', '100+', '140+', '180s', 'High Checkout', '3-dart Average']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Phil Taylor', 7.0, 68.0, 40.0, 126.0, 99.0, 32.0, 151.0, 104.1]
SQL:

assistant: SELECT SUM("3-dart Average") FROM "Table" WHERE "Legs Lost" > 41.0 AND "Played" > 7.0;