An executive-search firm has shown that job search time and higher salaries are directly correlated. They have shown that for every $10,000 of additional compensation the search will take an additional month. Is a month spent in searching rather than earning income a good investment if it promises a return of $10,000 per year? Answer this question assuming that this additional $10,000 will run for five years and using a 6% discount rate to calculate its present discounted value. please show and explaing the mathematical process also!