The First War of Indian Independence is a term used in India to describe the Indian Rebellion that took place in 1857. The war tested and ended the power and control of Britain and ended the 90 year rule the British had over India.
Goods originated from Mali: gold, ivory, copper;
Goods that Mali obtained through trade: salt, horses;
The Mali Empire was the largest and most powerful African Empire. It was relatively well developed, used its numerous natural resources to get wealth, and was heavily involved in trade. Some of the natural resources of Mali were the gold, copper, and ivory, and this empire used them to get enormous amounts of wealth, as these things were highly demanded and appreciated.
The wealth that Mali was getting, was later used for obtaining things through trade that the empire lacked, like the salt and the the horses. The salt was very popular for the cooking, while the horses were in high demand for transport and warfare.
They can buy 6 fossils because 68-40=28 and 28•4 is 6