Answer:
It would Pick Machine A
as it saves 16,790.73 as compared with machine B
Explanation:
We will calcualtethe present value of each machine.
But we have a problem, because one machine life is 4 years, and the other is 6 years. So to compare we need to match their useful life
4 year machine A and we have 6 years machine B
We will calculate the present worth for machine A
MACHINE A
[tex]C \times \frac{1-(1+r)^{-time} }{rate} = PV\\[/tex]
C 34200
time 6
rate 0.14
[tex]34200 \times \frac{1-(1+0.14)^{-4} }{0.14} = PV\\[/tex]
PV $99,648.96
Then we calculate the Net Worth
512,000 + 99,649 = 611,649
Now we do the same for Machine B
MACHINE B
[tex]C \times \frac{1-(1+r)^{-time} }{rate} = PV\\[/tex]
C 21500
time 6
rate 0.14
[tex]21500 \times \frac{1-(1+0.14)^{-6} }{0.14} = PV\\[/tex]
PV $83,606.35
Net Worth 798,000 + 83,606.35 = 881,606
Now how do we compare the 4 year machine with the 6 year machine ?
We will check which annuity payment equals the net worth for each project at our cost of capital rate
MACHINE A
[tex]PV \div \frac{1-(1+r)^{-time} }{rate} = C\\[/tex]
PV $611,649
time 4
rate 0.14
[tex]-226711.591116911 \times \frac{1-(1+0.14)^{-6} }{0.14} = PV\\[/tex]
C -209,920.86
MACHINE B
[tex]PV \div \frac{1-(1+r)^{-time} }{rate} = C\\[/tex]
PV $881,606.00
time 6
rate 0.14
[tex]-226711.591116911 \times \frac{1-(1+0.14)^{-6} }{0.14} = PV\\[/tex]
C -226,711.59
Now we compare each annuity:
-209,920.86 - (-226,711.59) = 16,790.73