A portable concrete test instrument used in construction for evaluating and profiling concrete surfaces (MACRS-GDS 5-year property class) is under consideration by a construction firm for $20,000. The instrument will be used for 6 years and be worth $1,500 at that time. The annual cost of use and maintenance will be $13,000. Alternatively, a more automated instrument (same property class) available from the manufacturer costs $33,000, with use and maintenance costs of only $9,500 and salvage value after 6 years of $3,500. The marginal tax rate is 25%, and MARR is an after-tax 12%. Determine which alternative is less costly, based upon comparison of after-tax annual worth. Show the AW values used to make your decision: Alternative 1: $ Alternative 2: $

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Chapter1: Making Economics Decisions
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A portable concrete test instrument used in construction for evaluating and profiling concrete surfaces (MACRS-GDS 5-year
property class) is under consideration by a construction firm for $20,000. The instrument will be used for 6 years and be worth
$1,500 at that time. The annual cost of use and maintenance will be $13,000. Alternatively, a more automated instrument (same
property class) available from the manufacturer costs $33,000, with use and maintenance costs of only $9,500 and salvage value
after 6 years of $3,500. The marginal tax rate is 25%, and MARR is an after-tax 12%.
Determine which alternative is less costly, based upon comparison of after-tax annual worth.
Show the AW values used to make your decision:
Alternative 1: $
Alternative 2: $
Carry all interim calculations to 5 decimal places and then round your final answer to the nearest dollar. The tolerance is ±10.
Transcribed Image Text:A portable concrete test instrument used in construction for evaluating and profiling concrete surfaces (MACRS-GDS 5-year property class) is under consideration by a construction firm for $20,000. The instrument will be used for 6 years and be worth $1,500 at that time. The annual cost of use and maintenance will be $13,000. Alternatively, a more automated instrument (same property class) available from the manufacturer costs $33,000, with use and maintenance costs of only $9,500 and salvage value after 6 years of $3,500. The marginal tax rate is 25%, and MARR is an after-tax 12%. Determine which alternative is less costly, based upon comparison of after-tax annual worth. Show the AW values used to make your decision: Alternative 1: $ Alternative 2: $ Carry all interim calculations to 5 decimal places and then round your final answer to the nearest dollar. The tolerance is ±10.
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