Funso (Chichewa): Mtengo wapakatikati wa chimanga cholemera ma kilogalamu 50 dziko lonse ndi uti?
Question (English): What is the national average price for a 50 kg bag of Maize on the most recent collection date?
Table: commodity_prices (difficulty: hard)
SQL: SELECT AVG(price) * 50 AS price_per_50kg_bag
FROM commodity_prices
WHERE commodity = 'Maize'
  AND collection_date = (
      SELECT MAX(collection_date)
      FROM commodity_prices
      WHERE commodity = 'Maize'
  );
Result: [(29979.324561447374,)]