Ms. Taylor is 21 years old and she just obtained her MBA degree. She is considering the following two career options:

(a)Start working now, earning an annual salary of $60,000 in each of next 44 years.

(b)Enroll in a PhD program, in 4 years and subsequent work for 40 years, earning each year the salary of $120,000.

Assume that her educational expenses at the end of each of 4 years will be $30,000. Also, assume that the relevant annual interest rate is 6% throughout, and all the annuities in the question are ordinary annuities. Based on the above information, find the implied or imputed monetary value of her PhD as of now.