Answer:
Since capatalism is a form of market economy, there is little government involvement. Therefore, the pronciple of supply and demand is the same. When the goods are profuces and and the price is chosen, we choose to pay it. If the price is high fewer people will buy it and supply is up, but demand is down. This will cause the prices to deflate because of buisiness lost. This works the other way as well.
(I'm sorry I needed points)