Table schema:
CREATE TABLE table_name_63 (total INTEGER, difficulty_score VARCHAR, rank VARCHAR, routine_score VARCHAR)

Question: What is the total with lower than rank 8, and higher than 27.6 score and 13.8 difficulty?
SQL: SELECT MIN(total) FROM table_name_63 WHERE rank > 8 AND routine_score > 27.6 AND difficulty_score = "13.8"