Funso (Chichewa): Kodi chimanga cholemera ma kilogalamu 50 boma la Rumphi chikugulitsidwa pa mtengo wanji?
Question (English): How much is a 50 kg bag of Maize in Rumphi on the most recent collection date?
Table: commodity_prices (difficulty: hard)
SQL: SELECT district, AVG(price) * 50 AS price_per_50kg_bag
FROM commodity_prices
WHERE commodity = 'Maize'
  AND district = 'Rumphi'
  AND collection_date = (
      SELECT MAX(collection_date)
      FROM commodity_prices
      WHERE commodity = 'Maize'
  )
GROUP BY district;
Result: [('Rumphi', 38222.25)]