Stay on subject.   You wanted a source quoting where keolu got a cost of $10 billion from.   I gave you 2 sources.   Just admit  you lost, and  stop trying to change the subject.  But it seems like since you can't handle being wrong, you just make up more nonsense but while doing it,  you get off subject.   You asked for a source,  you were given one.   Maybe you should do the same too.