Addressing a meeting of the Consultative Committee of Parliamentarians attached to his ministry in Mumbai on Monday, petroleum minister Jaipal Reddy said the exchange rate, which was Rs 46 per US dollar at the beginning of September, was hovering around Rs 49. “Weakening by every Rs 1 impacts the cost of diesel, PDS (public distribution system) kerosene and domestic LPG (liquefied petroleum gas) by Rs 8,000 crore per annum," he said.