What is the sum of goals scored in regular league play by Mustoe where he scored 0 goals in the League Cup?
CREATE TABLE "goalscorers" (
  "name" text,
  "league" real,
  "fa_cup" real,
  "league_cup" real,
  "total" real
);
SELECT SUM("league") FROM "goalscorers" WHERE "name"='mustoe' AND "league_cup"<0;