Sources:
https://www.19fortyfive.com/2025/03/the-f-47-fighter-cost-problem-no-one-wants-to-touch/
https://defencesecurityasia.com/en/iran-shahed-drones-gulf-patriot-air-defence-cost-crisis/ (assuming 2 missiles to each drone and the lowest estimate of drone costs)
Just give up dude. The OP who posted this also posted a reply to me with some figures backing up the logic behind this.
Yes, I know a missile is cheaper than the asset it’s protecting, but your enemy can just keep sending cheap drones until you run out of interceptor missiles, and that’s a massive problem.