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Answer:
The complete part of the question is found below:
Neglect the salvage value for payback period rate of return
Applicable rate of return is 15%
Answers:
Payback is 5.33 years
Present worth is -$18,909.48
UAC is -$ 4,996.58
Rate of return is 18.75%
Explanation:
In case of an even cash flow like this when the net cash flow yearly is $15,000($40,000-$25000), the payback period is initial investment/net annual cash flow
Payback=$80,000/$15,000= 5.33 Â years
Present is computed thus
Year  cash flow discount factor  pv=cash flow*discount factor
0 Â Â Â Â -$80,00 Â Â Â 1/(1+0.15)^0 Â Â Â (80,000.00)
1 Â Â Â Â $15000 Â Â Â Â 1/(1+0.15)^1 Â Â Â 13,043.48 Â
2 Â Â Â Â $15000 Â Â Â Â 1/(1+0.15)^2 Â Â Â 11,342.16 Â
3 Â Â Â Â $15,000 Â Â Â Â 1/(1+0.15)^3 Â Â Â 9,862.74 Â
4 Â Â Â Â $15,000 Â Â Â 1/(1+0.15)^4 Â Â Â Â 8,576.30 Â
5 Â Â Â Â $15,000 Â Â Â 1/(1+0.15)^5 Â Â Â Â Â 7,457.65 Â
6 Â Â Â Â $25,000 Â Â 1/(1+0.15)^6 Â Â Â Â Â 10,808.19 Â
present worth                   (18,909.48)
The uniform annual cost=NPV*r/(1-(1+r)^-n
NPV is -$18,909.48*0.15/(1-(1+0.15)^-6)
      =-$ (2,836.42) /0.567672404
      =-$ (4,996.58)
The rate of return can be computed thus:
rate of return=annual cash flow/initial investment*100
annual cash flow is $15000
initial investment is $80,000
rate of return=15,000/80000*100
           =18.75%