Africa's Coffee and Cocao

Today, much of Africa’s trade is coffee and cocoa, and countries with coffee are, Angola, Arabica, Arabusta, Benin, Burundi, Cameroun, Central African Republic, Congo, Cote Ivoire, Democratic Republic of Congo, Ethiopia, Gabon, Ghana, Ivory Coast, Kenya, Madagascar, Robust, Tanzania, Uganda, and Zimbabwe, also countries with cocoa are Siere loess, ivory coast, Ghana, toga, Nigeria, Cameroon, equatorial guinea, Gabon, Fernando Po, slo tome, and the Congo. Fair trade coffee/cacao is where coffee or cacao is priced higher, but some of the money is given to the third world countries. What would happen to Africa's economy if all the coffee and cacao crops vanished?