Answer:
$972,183.30
Explanation:
your monthly salary is $120,000 / 12 = $10,000
you will work for 30 years or 360 months
APR = 12%, so monthly discount rate = 12% / 12 = 1%
Present value = $10,000 x annuity factor
PV annuity factor, 1%, 360 periods = 97.21833
present value = $10,000 x 97.21833 = $972,183.30