How does district of columbia v heller relate to federalism

The document shows a personal allowances worksheet. this document is part of a

In a small, closed economy, national income (gdp) is $350 million for the current year. individuals have spent $100 million on the consumption of goods and services. they have paid a total of $60 million in taxes and the government has spent $75 million on goods and services this year. use this information and the national income identity to answer the questions. how much does the economy spend on investment?

Ais a group of people living and working under a set of rules and traditions.