>>70757
Honestly, you should read the literature. Choice or the relevant chapters in Human Action. They explain this better than we could. They're also excellent textbooks.
Are you familiar with the Mengerian account of money? If not, then you might wanna check it out, if you still have trouble understanding this. The Mises Wiki has good articles on these subjects. Menger explained how money acquired its purchasing power in the first place.
You might also be confusing price and value. Value is subjective, price is objective, but price is still determined by subjective preferences. The price of a good is what the marginal buyer is willing to buy it for, and what the marginal seller is willing to sell it for. Every single good acquires its cost in this way, both consumer goods and production goods.
To be honest, I don't know what your exact problem. If you elaborate on it, we can help you out better.