What can measuring a nations output of goods and services tell us about the economy

The size of a nation's economy is commonly expressed as it's gross domestic product (GDP), which measures the value of the output of all goods and services produced within the country on a year. You measure it by taking the quantities of all the goods and services produced, multiplying them by their prices, and summing the total.

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

answer; 55-85;