CREATE TABLE table_37265 ("School" CLOB, "Location" CLOB, "Mascot" CLOB, "# / County" CLOB, "Year joined" FLOAT, "Previous conference" CLOB, "Year left" FLOAT, "New conference" CLOB)

What year did Culver leave?
SELECT SUM("Year left") FROM table_37265 WHERE "Location" = 'culver'
SELECT SUM("Year left") FROM "table_37265" WHERE "Location" = 'culver'