Go here for all the cost of living rankings in Africa.
Xpatulator’s Cost of Living rankings are released every quarter and measure the comparative cost of living for expatriate professionals in 780 cities, covering every country worldwide. The cost of 13 basket groups with over 140 items are compared in each location, these include alcohol and tobacco, clothing, communication, education, furniture and appliances, groceries, healthcare, housing, personal care, recreation and culture, restaurants-meals-out and hotels, and transport.
Expatriate International Cost of Living 