Who was the runner-up after season 2 when the total prize money was $108,000?
CREATE TABLE "australia" (
  "season" real,
  "year" real,
  "mole" text,
  "winner" text,
  "runner_up" text,
  "total_prize_money" text,
  "potential_prize_money" text,
  "destination" text
);
SELECT "runner_up" FROM "australia" WHERE "season">2 AND "total_prize_money"='$108,000';