In closed economy national savings equal?

Question

In a closed economy, national savings equal the sum of private savings and public savings.
This means that national savings can be represented by the equation: National Savings = Private Savings + Public Savings. Since there is no foreign trade, all income generated within the economy is either consumed or saved domestically. Therefore, national savings is also equal to investment in a closed economy, 소액결제 현금화 as savings must finance investment.