You don't.
What some people may be thinking is that a GC will be offered for each of us and we'll bid 500B on it.
No. That's wrong. Instead of giving 500B, we would be buying the GC for 500B.
What should be done, and it better be so, is that we'll each buy a GC from Treas for its Market Value + 500B. Then, we would be buying the GC and giving the 500B (the competition fee).
Not sure how much a GC is worth now... but I bet its worth 600B.