What is the Decile with a State Authority and a roll of 120?
CREATE TABLE "franklin_local_board" (
  "name" text,
  "years" text,
  "gender" text,
  "area" text,
  "authority" text,
  "decile" real,
  "roll" real
);
SELECT SUM("decile") FROM "franklin_local_board" WHERE "authority"='state' AND "roll"=120;