Answer:
Leasing.
Explanation:
Find the present value of each and compare and choose the one with the lowest cost in present value terms.
LEASE;
Payments are in form of an annuity ;done using financial calculator (TI BA II plus)
PMT = -30,000
N ;duration = 4
I/Y = 10%
FV = 0
then CPT PV = -$95,095.96
BUY
Initial cost; (already in present value terms) = -$80,000
Annual maintenance(is an annuity); done using financial calculator (TI BA II plus)
PMT = -10,000
N ;duration = 4
I/Y = 10%
FV = 0
then CPT PV = -$31,698.65
Add PV of salvage value;
PV = FV/ (1+r)^4
PV = 20,000 /(1.10^4)
= 20,000/ 1.4641
= $13,660.26911
Overall PV of BUYING = (-80,000 -31,698.65 + 13,660.26911) = -$98,038.38
Therefore, leasing is a better option since the overall present value of costs is lower at $95,095.96 compared to that of buying at 98,038.38.