What is the average total with 1 FA cup and more than 0 FA trophies?
CREATE TABLE "topscorers" (
  "player" text,
  "club" text,
  "league" real,
  "fa_cup" real,
  "fa_trophy" real,
  "league_cup" real,
  "total" real
);
SELECT AVG("total") FROM "topscorers" WHERE "fa_cup"=1 AND "fa_trophy">0;