According to the pilot contract:
$0 to $2.5 billion 10.0%
Over $2.5 billion 20.0%
And if I do math right we get
$2.5B x 10% = 250M
(4.5B - 2.5B) x 20% = 400M
250 + 400 = 650M

So why on the press releases does it say that $1.1B was set aside for PS?