What was trade like between European and Africans before the 1800’s ?

Traders from Europe went to West Africa and offered cloth, rum, salt, and other goods in exchange for slaves. Many Africans became wealthy by trading slaves for goods like these. In addition to these goods, the European traders also offered to trade guns for slaves.

European trading had a transforming impact on Africa. Europeans poured into Africa enormous volumes of commerce, the whole range of European manufactured goods and hardware, notably firearms, luxury goods (especially alcohol) and transhipped items from Asia (particularly textiles).

because mexico wanted to choose a centralized location

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.