Table schema:
CREATE TABLE table_name_95 (league_goals INTEGER, flt_goals VARCHAR, total_apps VARCHAR, position VARCHAR, league_cup_apps VARCHAR)

Question: What is the sum of League Goals, when Position is "DF", when League Cup Apps is "0", when Total Apps is "7", and when FLT Goals is less than 0?
SQL: SELECT SUM(league_goals) FROM table_name_95 WHERE position = "df" AND league_cup_apps = "0" AND total_apps = "7" AND flt_goals < 0