SELECT SUM("Total") FROM table_69259 WHERE "Bronze" = '7' AND "Gold" > '18'
What is the total number of medals won by nations that had 7 bronze medals and more than 18 gold medals?
CREATE TABLE table_69259 (
    "Rank" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
)