supply of 5 lakh tonnes of gcv 5000 ( gar ) imported steam coal of any origin for theperiod from december 2023 to june 2024 for delivery at kamarajar port, ennoreand karaikal port; 1 unit cif price 2 cost of coal per mt 3 insurance per mt not exceeding 0.05 usd / mt 4 ocean freight per mt 5 total cif value per mt 6 exchange rate as on 28-03-2022 7 total cif value per mt in inr ( a ) ( after conversion of the exchange rate ) 8 basic custom duty ( b ) = 2.5% of ( a ) / applicable duty 9 social welfare charges ( c ) = 10% of ( b ) / applicable duty 10 igst ( d ) = 5% of ( a+b+c ) / applicable duty 11 any other duties / taxes applicable ( e ) 12 total duty ( f ) = ( b+c+d+e ) 13 total price ( g ) = total value in cif + total duty ( a +f )