The equation of exchange is a formula indicating that the number of monetary units times O A. nominal Gross Domestic Product (GDP) is identical to the price level times the number of times each monetary unit is spent on final goods and services. O B. the number of times each monetary unit is spent on final goods and services is identical to the price level times real Gross Domestic Product (GDP). O C. real Gross Domestic Product (GDP) is identical to the price level times the number of times each monetary unit is spent on final goods and services O D. the price level is identical to the number of times each monetary unit is spent on final goods and services times real Gross Domestic Product (GDP)