Oil marketers, has indicated that the cost of Premium Motor Spirit, popularly called petrol, would rise to between 680/litre naira and 720/litre naira in the coming weeks should the dollar continue to trade from 910 naira to 950 naira at the parallel market.They also hinted that dealers seeking to import PMS were being forced to put the plans on hold due to the scarcity of foreign exchange to import the commodity.The warning came barely one week after the l...