If the MoD would only get a move on with FSTA, I'd be quite content for the RAF to call it Susan if it made them happy!
Now then. 139 aeroplanes for US$40 billion (roughly £20B) = £144M per jet
FSTA is £13B for, what is it, 9 aircraft? 9 X £144M = £1.3B by conventional procurement - so that's £11.7 for everything else over 25-30 years?
Great cost saver, this PFI bolleaux......