A contractor has an excavator requiring repairs within her fleet of cquipment for executing projects. She is offered $6,000 for the equipment by another contractor but refuses to sell. Other financial details of the excavator are as follows: Repair cost of $4,000 Useful life of 5 years At the end of year 1, the operation and maintenance cost is pegged at $2.000. This value increases by $1,000, S1,200, S1,400, and $1,600 for the following years. At the end of year 1, the salvage value is pegged at $6,000. This value decreases by 25% for the following years. The minimum acceptable rate of return (MARR) is 12%. Due to the constant use and operation and maintenance required, determine how long this equipment should be kept by the contractor. N.B. SHOW THE DETAILED WORKINGS FOR EACH YEAR. DO NOT STOP AT YEAR AFTER THE ECONOMIC LIFE.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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A contractor has an excavator requiring repairs within her fleet of cquipment for executing projects. She is offered $6,000 for the equipment by another contractor but refuses to sell. Other financial details of the excavator are as follows: Repair cost of $4,000 Useful life of 5 years At the end of year 1, the operation and maintenance cost is pegged at $2.000. This value increases by $1,000, S1,200, S1,400, and $1,600 for the following years. At the end of year 1, the salvage value is pegged at $6,000. This value decreases by 25% for the following years. The minimum acceptable rate of return (MARR) is 12%. Due to the constant use and operation and maintenance required, determine how long this equipment should be kept by the contractor. N.B. SHOW THE DETAILED WORKINGS FOR EACH YEAR. DO NOT STOP AT YEAR AFTER THE ECONOMIC LIFE.
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