The only people with accurate cost data would be actual cartridge manufacturers, and they undoubtedly regard such information as proprietary. No company shares product cost data on a public forum.
To what practical uses could you put such information? Offhand, I can only think of two:
1. You plan to manufacture cartridges yourself and are trying to develop your business model. (If that's the case, why would you expect help from companies you'd be competing with?)
2. You want to have a basis for griping about the prices of cartridges. (If that's the case, why should any cartridge manufacturer assist you?)
Trolling, are we...?
To what practical uses could you put such information? Offhand, I can only think of two:
1. You plan to manufacture cartridges yourself and are trying to develop your business model. (If that's the case, why would you expect help from companies you'd be competing with?)
2. You want to have a basis for griping about the prices of cartridges. (If that's the case, why should any cartridge manufacturer assist you?)
Trolling, are we...?