What is the purse total for the royal caribbean golf classic?
CREATE TABLE "tournament_results" (
  "date" text,
  "tournament" text,
  "location" text,
  "purse" real,
  "winner" text,
  "score" text,
  "1st_prize" real
);
SELECT SUM("purse") FROM "tournament_results" WHERE "tournament"='royal caribbean golf classic';