This book is designed primary to supplement the students who are reading degree course in the field of Business especially in Accounting, Managerial Accounting, Economics, and Finance. The student is therefore enjoined to go through the worked examples very carefully to enable him/her to solve the problem in the field of business. The writer, having study economics to the level of Ph.D. with the major in Economics Development for many years has identified the following major problems associated with the study of Macroeconomics. Most books on Macroeconomics presented in manner confusing the student to run away from studying economics at the Degree level. It is for these reasons that the writer deems it necessary as a young Economist to write this book in macroeconomics to provide a lasting solution to these problems associated with the study of Macroeconomics.