Funso (Chichewa): Kodi mitengo yonse ya Chimanga yomwe inalembedwa ku Lilongwe ndi yochuluka bwanji chatsopano?
Question (English): What is the total of recorded Maize prices in Lilongwe on the most recent collection date?
Table: commodity_prices (difficulty: hard)
SQL: SELECT district, SUM(price) AS total_price_sum
FROM commodity_prices
WHERE commodity = 'Maize'
  AND district = 'Lilongwe'
  AND collection_date = (
      SELECT MAX(collection_date)
      FROM commodity_prices
      WHERE commodity = 'Maize'
  )
GROUP BY district;
Result: [('Lilongwe', 1750.0)]