What is the total number of averages with an interview of 8.75 when the evening gown number was bigger than 8.75?
CREATE TABLE "preliminary_competition" (
  "state" text,
  "swimsuit" real,
  "evening_gown" real,
  "interview" real,
  "average" real
);
SELECT SUM("average") FROM "preliminary_competition" WHERE "interview"=8.75 AND "evening_gown">8.75;