The CNG stations earned a handsome gain overnight due to a single government mistake that was later attributed to a calculation or conversion error. We all saw Mr. Shah Mehmood Qureshi, the Minister of Petroleum, announce an increase of Rs13 in CNG prices. Later, the Petroleum Ministry issued a clarification late on Tuesday. The CNG operators, meanwhile, benefited on account of the government mistake. Will the government take any action against those in the Ministry of Petroleum who do not even know how to compute statistics? -MUHAMMAD AAMIR, Rawalpindi, via e-mail, July 2.