sentences:  He paid 12 to 15 manillas of brass for a slave, fewer if they were of copper.By 1522 in Benin a female slave 16 years of age cost 50 manillas; the King of Portugal put a limit of 40 manillas per slave to stop this inflation.Earliest report on the use of Manillas in Africa points to its origin in Calabar the capital city of the Cross River State of coastal Southeastern Nigeria.