Monitor the market

Although it is said that the price of edible oil i.e. soyabean oil (per kg.) should be Tk 112 (source: The Daily Star & the daily Prothom Alo-- 10th July 2008), it is seen that in many markets soyabean oil is sold at a much higher price.
I think the prices of essential commodities should be monitored by the competent authorities.