Interesting that the pyramid appears to reach the top payout all by itself without any extra bonus for completing the whole thing (as if that was ever going to happen).
I'm not sure, but the lower tier values appear to be $250, $500, $750, and $1,000. That adds up to $7,500, but the top box appears to be $2,000, which comes up a bit short of $10k.
(ETA: Although, looking at the set design, it might be that the big pyramid wasn't a bonus round at all, since there's no seating area; perhaps it was the board for main gameplay, and the money was accumulated one category at a time?)