Numbers of barrels per 1000 kg3 Jan 2021 17:36
Density= (141,5/(API+131,5)
Kraken API=13,7 gives
Density=141,5/(13,7+131,5)=0,9745 kg/liter
Density=Mass/Volume
Volume=Mass/Density=1000/0,9745=1026 liters
I barrel=159 liters
1026/159=6,45
400 dollars per 1000 kg gives us
400/6,45=62 dollars per barrel