How about 5% ? I think this is the most realistic margin.
I have a Sony notebook, VGN-AW235J/B to be exact.
It has
1. Intell motherboard & processor (third party)
2. 2 x Hitachi HDDs (third party)
3. Nvidia graphics card (third party)
4. Sony display (made in Japan)
5. Sony battery (made in China)
6. Sony body and metal work (made in China)
7. Third party RAM (don't remember manufacturer but its not sony)
8. Third party Blue Ray Drive
9. Most of the ports and cards/chips (network, wireless, HDMI, Tuner) are also third party products.
10 . And if you open it, 95% of the components don't have Sony written on any of them
But still, it is a Sony product, and sony bags the majority of the profit after every parts manufacturer (called OEMs) have bagged their own part's profit. It is because the "SONY" company holds the license to combine these products in one single UNIQUE package and market it under its own name.
Even if Sony releases the license to some other company to "license built" their own, Sony will still bag a major portion of profits just because of the license. It will still be a Sony product.
I hope you can implement the same analogy to JF-17, but with an exception that the license is "Co-Owned" by Pakistan and China (just like Sony-Erricson, Fujitsu-Siemens etc).
Regards,
Sapper