The 1.5 trillion Dollar figure does not only represent the cost of buying planes, but also dinfrastructure upgrades, personnel training and 50 years worth of spare parts. At the current production lot an F-35A goes for $98 million. An F-35A purchased in 2018 and delivered in 2020 will be $85 million, which is the equivalent of $75 million in today’s dollars. Most people don't seem to understand economy of scale, or any other economic realities for that matter. Some people can't even balance their credit cards.
Some people don't understand 88 sorties for 15 bombs or being waxed in a dogfight by an F-16D.
I have a Masters in Economics. Your numbers are based on flawed assumptions and are not fly away costs--among many other errors.
Unit price per a 2015 Defense Committee report (US Congress):
F-35A (USAF) costs $148 million.
F-35B (USMC) costs $251 million.
F-35C (USN) costs $337 million.
If we took the average based on total procurement a single F-35 would cost $178 million and climbing
That's a long way from what was promised--"Cheaper than an F-16." How many Vipers can I buy for a single JSF? Three? Four? Five?
The JSF rah rah squad can keep spinning, but the numbers don't lie.