"€90m “break payment” if it decided to cancel when Naval Group had already submitted a basic design, rising to €250m"
€250m is $400m. Although the full plan hasn't been provided yet, it has been worked on as I understand it. I don't think we declined to go forward. At the basic design 'break payment' of €90m. So i would guess it is between the two.
Australia has spent $2.4 billion, it wasn't a decision taken lightly.