Three biggest iron ore suppliers expected to improve the quotation of the last three quarters

After a ton of $130 a barrel of quotation in the second quarter with the Asian buyers on April 1st ,Rio and CVRD and BHP billiton has expected to improve the quotation of the last three quarters in the new price negotiation  to $160 per ton. This offer is based on an average spot price of the last 3-5 months.according to Australian Financial observerreported.