23. You plan to go to school for 4 years, starting next year. You can pay $38,507 per year, starting next year or you can pay a single amount of $155,112 today. If your investment account earns 2.96% compounded annually, how much would you save or lose in PV terms by paying all the tuition today?

Note: If you would lose money by paying today, make your answer with a negative sign (e.g., - 3458)

27. You have a student loan that requires you to pay $180 per month, starting next month, for 94 months. You can make these payments or enter a new loan that requires you to pay $120 per month, starting next month, for 45 months. To switch to the new loan will cost you a "financing fee" of $1,793 today.

If your investments earn 2.02% APR (compounded monthly), how much do you save in PV terms by taking out the new loan?