CREATE TABLE table_77337 ("Official Name" TEXT, "Status" TEXT, "Area km 2" FLOAT, "Population" FLOAT, "Census Ranking" TEXT)

Can you tell me the sum of Area km 2 that has the Official Name of glenelg?
SELECT SUM("Area km 2") FROM table_77337 WHERE "Official Name" = 'glenelg'
SELECT SUM("Area km 2") FROM "table_77337" WHERE "Official Name" = 'glenelg'