From some DASA stats I saw a while back the "Full Cost" of a GR9 per flying hour is in the region of £35k, whereas GR4 is less than £30k - the exact figures, I believe were 'Restricted-Commercial'. Typhoon was 3 times the amount at around £90k!!!
I understand the current USN price for a F18E/F/G in the latest multi-year buy is around $43 million each...