The Kingdom of Ghana lasted from 500 c.e to 1200 c.e,
Ghana was ruled by a powerful king who held court with his people daily to hear out their concerns and to conduct business
Camels were used to transport goods across the Sahara and the Trans Saharan Trade route. They were suited for this because they could travel several days without stopping and they could carry heavy packages and goods that were being transported.
What made the Wangaran mines so interesting was that no one but the Wangarans knew where the gold mines were. The Wangarans kept the locations of their gold mines a secret and to this day, we still don't know where they're exactly located.
The Taghaza salt miners were slaves, owned by Arab merchants. They reached the salt by digging trenches and tunnels and dug the salt out in big blocks. Salt was a precious resource, and was more precious than gold.
The tax systems payed the armies to protect the kingdom. Taxes were paid on all the good traders carried when the entered Ghana and when they left. Traders also paid different taxes for different items. These taxes enriched Ghana and protected the kingdom and its trade routes.
Traders brought their goods to the great marketplace in the capital city of Kumbi. From there they would head to the southern forests to trade in Wangara. Kumbi had the busiest market in the whole of West Africa so many traders and local people sold their items there. Everything you could find was sold there from blue blouses to slaves, and was paid for with gold dust.