I think if you re-read the company announcement from Jan 24 then...

I think if you re-read the company announcement from Jan 24 then you will be able to fix the above numbers and answer some of your questions.
They say they are paying in lieu of surrendering 1.9million LGC. So they will still surrender some.

They also point back to an announcement from June 20 where they noted that the LGC price had doubled and that their inventory of certificates had increased in value.

That leads me to believe that I am correct in thinking they have a big stash of these certificates and the punt has been paying off well so far. Now they ride it until as close to 2020 as possible when forced buyers are made to cough up, so to speak.

All IMO, DYOR.