What is the main concern of microeconomics?

What is the value of a 1948 silver penny? What remnant of European influence is blamed for helping to cause mass poverty and social inequality throughout Middle and South America? How does balance of trade differ from balance of payments? What are the constituents of corporate governance? Who controls the price of oil in the middle east? What is the current law that affects the goods Americans buy and what would a laissez-faire economist think of it? Why is social responsibility important for profit strategy? Whose goal is to establish international technological standards to facilitate global exchange of information and barrier free trade? How is gross domestic product calculated? How can people contribute to labor force? Explain briefly what is demand and supply curve? Does widespread unemployment change the economic logic of protectionism? When do slaves eat lunch? What are the main goal of macroeconomics? Briefly discuss Profit with the help of example? How much does US pay for a barrel of imported oil? What industry did john d. Rockefeller come to control? What is the balancing item in the balance of payments? What kind of engineering helps one country's economy the most? What can't capitalism do?