Could you make an accurate list of things and their cost (and your profit if there is any) that constitute of the 3 BTC?
No, of course not. What a ridiculous request. I wouldn't be requiring an NDA if that were the case.
I'm really not sure what motivates so many people from the EU to insist upon casting aspersions upon this project and demanding a minute accounting of 30 BTC. Are you considering spending 1500 EUR to fly here and attend the Boot Camp, and that's the reason you are concerned about 3 BTC? Or are you just trolling?