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Due to expanded growth in a certain portion of the city, a new waste truck capacity is needed

Economics Dec 14, 2020

Due to expanded growth in a certain portion of the city, a new waste truck capacity is needed. An additional truck can be purchased now to replace the presently owned assets. The city uses a 5% interest rate for project evaluation. It is economically viable to buy the new waste truck?

 

New Model

 

Present value $72,000

Annual cost 12,500

Annual savings 31,000

Salvage value 7,200

Life in years 10

 

a)   PW = 191,097.03

b)    PW = -326,256.87

c)   PW = 70,851.45

d)   PW = $75,271.53

Expert Solution

Annual Cost=12500

Annual saving=31000

Net Saving=31000-12500

=18500

 

Present Value of Net Saving= Net saving* Annuity Factor (5%@10 years)

Annuity factor = (1- (1+ rate)^ -time period)/ rate

= (1- (1+ 5%)^ -10)/ 5%

= 7.72173

 

P.V of Net Saving=18500* 7.72173

=  $ 142,852.01 

 

Present Value of Salvage Value=7200/ (1.05^10)

=  $4,420.18 

 

PW= -Present Value+ P.V of Net Saving+ P.V of Salvage Value

PW = -72000+$ 142,852.01 +$4,420.18 

= 75272.19

 

Answer is little different because of decimals. Option d. is closest so, PW will be $75,271.53.

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