Solution:

The Central African CFA franc is the currency of six independent states in Central Africa: Cameroon, Central African Republic, Chad, Republic of the Congo, Equatorial Guinea and Gabon. These six countries have a combined population of 55.2 million people (as of 2020),and a combined GDP of US$113.322 billion (as of 2020).The CFA franc was introduced to the French colonies in Equatorial Africa in 1945, replacing the French Equatorial African franc. The Equatorial African colonies and territories using the CFA franc were Chad, French Cameroun, French Congo, Gabon and Ubangi-Shari.