Petrol and diesel : the real price

Do you know what we pay for the petrol and diesel corresponds to international oil price, if you are paying around Rs.50 then the corresponding international rate should be around $190per barrel, but its still around $140 and the price should stand at Rs.37. But why we are paying such a huge amount its because about 40% taxes are levied both by central and state government and here in Karnataka we pay around Rs.58 corresponding to $220 per barrel.