CFA Franc BEAC (XAF) is the currency for Cameroon, Central African Republic, Chad, Congo, Equatorial Guinea and Gabon.
CFA Franc BCEAO (XOF) is the currency of Benin, Burkino Faso, Cote D'Ivoire, Mali, Niger, Senegal and Togo.
You may see the message, "Estimated price based on daily US dollar rates." This message is displayed for currency pairs where relatively little data is available, and means that the exchange rate for the converted currencies was computed from cross rates with the US dollar.