In a closed economy with no government, if consumption is ₦8,400 billion, investment is ₦2,100 billion, and depreciation is ₦600 billion, what is the Net National Product (NNP)?

In a closed economy with no government, GDP = Consumption + Investment = ₦8,400 billion + ₦2,100 billion = ₦10,500 billion. NNP = GDP − Depreciation (Capital Consumption Allowance) = ₦10,500 billion − ₦600 billion = ₦9,900 billion. NNP accounts for the wearing out of capital stock during the production process.