The price is called interest. If savings exceed demand, interest rates will be low. If demand exceeds savings, interest rates rise. But there is generally a balance between savings and investment in the normal course of economic activity. In other words, supply and demand always tend toward equilibrium.
Businesses borrow money to expand their enterprises based on the money available for loans.
They take it for granted that the money available for lending represents an overall consumer preference for future consumption. Guided by this preference, business operators adjust their plans for the future. If an outside agency interferes with the money supply, the equilibrium between savings and investment is disturbed. This happens in the United States when the Federal Reserve System increases the money supply. In the language of Economists this is referred to as M3.