Answer:
The Incans did not rely on trade, but the Egyptians did. The Incans collected taxes, but the Egyptians did not. The Incans used to barter, but the Egyptians did not. The Incans did not have paper money, but the Egyptians did.
Because they owned every step of the process to make steel like for example they owned the mines to mine the iron. Then they would own a 2nd mine to mine the coal for the steel. Then they would own the factories to make the steal. That is a vertical monopoly so for shorting your answer you can say they owned the mines and the factories to make the steel.
Great use with dealing with the spirit world
If you mean like using a credit card then my response might help. So when you to an atm you can transfer paper money into your credit card by answering the questions on the screen and you can also take a loan from the machine of paper money or money in your card soon resulting in returning the money that you borrowed. If this is a question about math then credit is a positive term. So if a question asks about a persons money then you know that the money they have is positive. I hope I helped although this is labeled as a history question. Good luck.