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Cost data related to two alternative systems (A and B) is given below

Economics Dec 15, 2020

Cost data related to two alternative systems (A and B) is given below. Interest rate is 10% per year: A B First cost, $ -25,000 - 150,000 Refurbishment cost -2,500 at the end of year 3, $ Annual cost, $ per year -7,000 -4,500 Salvage Value, s 3,000 50,000 Life, years 6 1. [ 4 pts. ] Which one of the value is closest to the annual worth for alternative A? $-12,425 $-14,780 $-14.425 $-12.780 2. [ 4 pts. ] Which one of the value is closest to the annual worth for alternative B? $-17,500 $-19,500 $-16,500 $-14,500 3. [ 4 pts. ] Which one of the value is closest to the capitalized cost of Machine B? $-175.000 $-181,250 $-206,250 $-195,000

Expert Solution

Answer:

1. -$12,780

2. -$14,500

3. -$195,000

Explanation:

1. Annual Worth of Alternative A

interest rate i = 10%

AW = -$25,000 * (A/P, 10%, 6) - $2,500 * (P/F, 10%, 3) * (A/P, 10%, 6) - $7,000 + $3,000 * (A/F, 10%, 6)

Compute (A/P, i%, n) using [i * (1 + i)n] / [(1 + i)n - 1]

(A/P, 10%, 6) = [0.1 * (1 + 0.1)6] / [(1 + 0.1)6 - 1] = [0.1 * (1.1)6] / [(1.1)6 - 1]

                    = [0.1 * 1.7716] / [1.7716 - 1] = 0.1772 / 0.7716 = 0.2296

Compute (P/F, i%, n) using (1 + i)(-n)

(P/F, 10%, 3) = (1 + 0.1)(-3) = (1.1)(-3) = 0.7513

Compute (A/F, i%, n) using i / [(1 + i)n - 1]

(A/P, 10%, 6) = 0.1 / [(1 + 0.1)6 - 1] = 0.1 / [(1.1)6 - 1]

                    = 0.1 / [1.7716 - 1] = 0.1 / 0.7716 = 0.1296

AW = (-$25,000 * 0.2296) - ($2,500 * 0.7513 * 0.2296) - $7,000 + ($3,000 * 0.1296)

       = -$5,740.18 - $431.27 - $7,000 + $388.82 = -$12,782.63

Annual Worth of Alternative A is -$12,782.63

1. Annual Worth of Alternative B

interest rate i = 10%

Annual Worth of fist cost = - $150,000 * 0.1 = -$15,000

Annual cost = -$4,500

Annual Salvage value = $50,000 * 0.1 = $5,000

Annual Worth = -$15,000 - $4,500 + $5,000 = -$14,500

Annual Worth of Alternative B is -$14,500

3. Capitalized cost of Alternative B

Capitalized cost = first cost + (Annual cost / interest rate)

                        = -$150,000 - ($4,500 / 0.1) = -$150,000 - $45,000

                        = -$195,000

Capitalized cost of Alternative B is -$195,000

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