Answer: $9,741.43
Step-by-step explanation:
The highest cost of migration that the worker is willing to incur is the one that will equate the present value of the salary in Phoenix to the salary in Chicago.
Chicago = 40,000 + 40,000/(1 + 8%) + 40,000/ (1 + 8%)^2
= $111,330.59
Phoenix = 43,500 + 43,500/(1 + 8%) + 43,500/ (1 + 8%)^2
= $121,072.02
Hoghest cost of migration = 121,072.02 - 111,330.59
= $9,741.43
If the Cost of migration exceeds $9,741.43, the worker should stay in Chicago.