Table schema:
CREATE TABLE table_name_21 (geo_id INTEGER, water__sqmi_ VARCHAR, township VARCHAR, land___sqmi__ VARCHAR, latitude VARCHAR)

Question: what is the geo id when the land (sqmi) is less than 36.112, the latitude is more than 47.536618, the township is west bay and water (sqmi) is more than 0.209?
SQL: SELECT SUM(geo_id) FROM table_name_21 WHERE land___sqmi__ < 36.112 AND latitude > 47.536618 AND township = "west bay" AND water__sqmi_ > 0.209