Apple decided that all songs sold on iTunes for about a decade would cost exactly 99 cents. The music industry did not collapse. Almost all full size major video game releases have cost $60 for two decades and that industry has grown tremendously. The statutory maximum price could be significantly higher than what is typical to prevent works from being unobtainable without interfering with price negotiations of most works.

That's orthogonal to my point. I only added the reasonable amount requirement because otherwise the change in law is useless - if you don't want to license to someone, just charge a billion dollars.

But to answer your question, a court would decide, based on comparable deals, and with ample (but not infinite) latitude for the rightsholder to deviate from established prices.