CREATE TABLE table_16019 ("Episode #" FLOAT, "Production code" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Airdate" TEXT)

what is the minimum production code with title 'foreign exchange problem / turn about
SELECT MIN("Production code") FROM table_16019 WHERE "Title" = 'Foreign Exchange Problem / Turn About'
SELECT MIN("Production code") FROM "table_16019" WHERE "Title" = 'Foreign Exchange Problem / Turn About'