In: Finance
3.GHI company wants to buy an air conditioner. There are two options in the market. The discount rate is 17%. Option A: Super air conditioner cost $300 to purchase, can be used for 5 years, and the electricity bill is $150 per year. Option B: Excellent air conditioner cost $500 to purchase, can be used for 8 years, and the electricity bill is $100 per year.
a) What are the equivalent annual costs (EAC) of the Super and Excellent air conditioner models?
b) Which model is more cost-effective (with lower cost)?
c) If the inflation rate is expected to be 10% per year, redo a.) and b.)
EAC = Present value of Cost/(PVIF i%,n)
Calculation of Present value of cost (A)
PV (A) = Initial cost + Annual cost(PVIF i%,n)
PV (A) = 300 + 150(PVIF17%,5)
PV (A) = 300 + 150*3.1993
PV (A) = $ 780
Present value of cost for (B)
PV (B) = 500 + 100(PVIF17%,8)
PV (B) = 500 + 100*4.2072 = $921
Calculation of EAC
EAC (A) = 780/3.1993 = $243.80
EAC (B) = 921/4.20716 = $218.91
Based on EAC, Option (B) is the more cost effective , because of lower cost
(C)..Calculation of annual cost inculding inflation
Years | Inflation factor | Option (A) | Option (B) | PVIF17% | PV (A) | PV (B) |
1 | 1.10 | 165 | 110 | 0.8547 | 141.03 | 94.02 |
2 | 1.21 | 181.50 | 121 | 0.7305 | 132.59 | 88.39 |
3 | 1.331 | 199.65 | 133.10 | 0.6244 | 124.66 | 83.11 |
4 | 1.4641 | 219.62 | 146.41 | 0.5337 | 117.21 | 78.14 |
5 | 1.61051 | 241.58 | 161.05 | 0.4561 | 110.18 | 73.45 |
6 | 1.771561 | 177.16 | 0.3898 | 69.06 | ||
7 | 1.9487171 | 194.87 | 0.3332 | 64.93 | ||
8 | 2.14358881 | 214.36 | 0.2848 | 61.05 | ||
Sum (ups) | 625.67 | 612.15 |
Present Value (A) = 300+625.67 = $925.67
Present value (B) = 500 + 612.15 = 1,112.15
EAC (A) = 925.67/3.1993 = $289.33
EAC (B) = 1,112.15/4.20716 = $264.35
Still the option (B) is more cost effective