Funso (Chichewa): Kodi mtengo wotsika ndi wokwera wa mtedza ndi chani? 
Question (English): What is the price range of Groundnuts?
Table: commodity_prices (difficulty: medium)
SQL: SELECT MIN(price), MAX(price) FROM commodity_prices WHERE commodity = 'Groundnuts' AND price > 0;
Result: [(927.07, 4014.1)]