WHC Prices Realized Thermal vs. Met Coal

In the last quarter of 2023 WHC realized prices averaged US$142/MT for thermal coal, but only US$166 for met coal (from most recent quarterly production report). Can anybody explain why WHC's met coal average price is so low compared to spot prices which were in the US$250- US$300/MT range. I hope they can do better than this with the substantial Blackwater/Daunia met coal production they will be adding in April. It makes a VERY BIG difference if they get close to spot prices vs. a substantially discounted price. I am assuming they should get similar prices to what BHP has been receiving for Blackwater/Daunia production over the past couple of years and I certainly hope these have been a lot higher than WHC achieved in Q4 2023 for its own met coal production.