If you are concerned, to the point that you go through the pain...

If you are concerned, to the point that you go through the pain of getting your breasts sandwiched, and radiated in metal plates, tell me, you might be prepared, on the precautionary principal, to which you have already qualified yourself as, that you would indeed be prepared to spend $300.

They are concerned they could get breast cancer, now told that this test can pick it up early, before a lump presents, etc,. What is standing between the fear, and the peace of mind ? $300?

Plenty i think would pay up.
Now consider the volumes

2.1 m Mams AUS x BCAL % Augmented x $300 per test (70-100% margin)
52m Mams USA x BCAL % Augmented x $600 per test (margin not stated)

Pre revenue , and post start commercial, are all speculative forward looking projection, on how tall that mountain is. It is the growth up that mountain, that can grow year on year, which can see speculators paying ahead of actual profits.

We are also talking about selling a cold drink of water to a person in the desert. They are already qualified as thirsty. The rest is about getting enough awareness, and watering cans to them.