CREATE TABLE table_77270 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Location" TEXT, "Attendance" FLOAT, "Record" TEXT, "Points" FLOAT)

What sum of game has an attendance of 18,690?
SELECT SUM("Game") FROM table_77270 WHERE "Attendance" = '18,690'
SELECT SUM("Game") FROM "table_77270" WHERE "Attendance" = '18,690'