Funso (Chichewa): Kodi mtengo wapakatikati wa Chimanga ku Kasungu ndi uti?
Question (English): What is the average Maize price in Kasungu on the most recent collection date?
Table: commodity_prices (difficulty: hard)
SQL: SELECT AVG(price)
FROM commodity_prices
WHERE commodity = 'Maize'
  AND district = 'Kasungu'
  AND collection_date = (
      SELECT MAX(collection_date)
      FROM commodity_prices
      WHERE commodity = 'Maize'
  );
Result: [(618.986,)]