Monthly cost calculation of bitumen in Iran

Monthly cost calculation of bitumen 60/70 and 80/100 

Bitumen price updating monthly and cost claculation of bitumen 60/70 and bitumen 80/100 has formalu which is control and reporting by NIORDC (National oil refining and distribution company) by end of each months(local calender) which is 22 of each Christian calender.

V.B=(Furnace oil380-30% Kerosin)/70%

If:1.63<K/F<1.73

Then bitumen price will come up based on FOB and 10% as cost of transport and process will deduct then put in IME to do the deal.

This formula adjusted 10 years before and still there is scale for cost calculation of bitumen on ech month