or example you are from a 3rd tier city in China. You make about 5000 per month in your hometown, and your monthly expense is 1000. However, if you move to Shanghai, you can make about 10,000 per month, however, your monthly expense will be 6,500. Which city would you choose, only consider differential costs. I would choose ____, because the deferential income (after paying expenses) between these two cities is $_____. Working at _______has higher deferential income (after paying expenses) than ______.