40 helicopters+5,000 missiles for only $1 billion
40 super cobras=$30 mil a pop so right there that's $1.2 billion, 5,000 hellfires=$650 million so that's $1.850 billion and this isn't including spare engines and other stuff and what ever else would go along with the deal.
you would be looking at $2 to $2.5 billion which isn't really all that bad considering what you are getting
unless you are talking Russian,Chinese, or the Turkish attack helicopters then I can see you probably for the same kinda package $1 billion for the Russian Helicopter since I think the Mi-28N is half the price of the Viper and the Ataka-V is a third the price of a Hellfire II-R, Chinese would probably be $1.5 billion, and the Turkish around the same the Viper maybe a tad cheaper overall $1.8 billion to$ 2. billion