Nara inherits a perpetuity from her grandfather that will pay here $3000 today and every year forever. The annual interest rate is 4%.
a) How much is Nara's inheritance worth? Nara decides to sell the perpetuity (for its present value) and instead buy an annuity due paying $P for the next 28 years.
b) What is $P? She changes her mind again, and decides instead on an annuity due paying $6000 per year for n years, except for the last (nth) payment which is a drop payment
. c) What is n?
d) What is the amount of the final payment?
Answer (a):
Perpetuity from her grandfather will pay $3000 today and every year forever.
The annual interest rate is 4%
Worth of Nara's inheritance = (3000/4%) + 3000 = $78,000
Worth of Nara's inheritance = $78,000
Answer (b):
PV of annutiy = $78,000
Annuity due for 28 Years
Interest rate = 4%
$P = PMT(rate, nper, pv, fv, type) = PMT(4%,28,-78000,0,1) = $4500.97
$P = $4,500.97
Answer (c):
PMT = $6,000
Number of periods = NPER(rate, pmt, pv, fv, type) = NPER(4%,6000, -78000,0,1) = 17.672988 or 18
n = 18
Answer (d):
Period for finanal payment is = 17.672988 - 17 = 0.672988
Amount of final payment = PV(rate, nper, pmt, fv, type) = PV(4%,0.672988, -6000,0,1) = $4063.76
Amount of final payment = $4,063.76
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