CREATE TABLE table_name_20 (unit INT, aircraft VARCHAR, location VARCHAR)

What is the Unit for the Aircraft F.e.2b, located in Logeast?
SELECT SUM(unit) FROM table_name_20 WHERE aircraft = "f.e.2b" AND location = "logeast"
SELECT SUM("unit") FROM "table_name_20" WHERE "aircraft" = "f.e.2b" AND "location" = "logeast"