what is the least number of goals for when the goals against is 70 and the ties less than 0?
CREATE TABLE "final_standing" (
  "team" text,
  "games_played" real,
  "wins" real,
  "losses" real,
  "ties" real,
  "goals_for" real,
  "goals_against" real
);
SELECT MIN("goals_for") FROM "final_standing" WHERE "goals_against"=70 AND "ties"<0;