A mining company is deciding whether to extract copper from two locations. Location A is near another mine owned by the company. The copper would be mined using a surface mine. A groundwater source can be found close by. Location B is farther away from the other mine location. The amount of copper ores in location B is three times higher than the rock found at location A. Other metals have been found in the mine as well, including gold and silver. Which location do you think would provide a more cost-effective source of this mineral? Provide three reasons for your answer.