What is the total with lower than rank 8, and higher than 27.6 score and 13.8 difficulty?
CREATE TABLE "qualification" (
  "rank" real,
  "gymnast" text,
  "difficulty_score" text,
  "routine_score" real,
  "total" real
);
SELECT MIN("total") FROM "qualification" WHERE "rank">8 AND "routine_score">27.6 AND "difficulty_score"='13.8';