Should a GDP (Gross Domestic Product) measure include factors beyond cash earned?

Gross domestic product, GDP, is one way of measuring the size of the economy-but it's not the only way. We can also measure the size of the economy by calculating gross national product, GNP, or net national product, NNP.

Based on the information in the table below, what is the value of GDP? What is the value of net exports? What is the value of NNP?

Government purchases $120 billion

Depreciation $40 billion

Consumption $400 billion

Business investment $60 billion

Exports $100 billion

Imports $120 billion

Income receipts from rest of the world $10 billion

Income payments to rest of the world. $8 billion