Contemporary Engineering Economics (6th Edition)
6th Edition
ISBN: 9780134105598
Author: Chan S. Park
Publisher: PEARSON
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Chapter 6, Problem 32P
To determine
Calculate the cost per mile.
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Problem 06.008 Annual Worth and Capital Recovery Calculations
White Oaks Properties builds strip shopping centers and small malls. The company plans
to replace its refrigeration, cooking, and HVAC equipment with newer models in one
entire center built 11 years ago. 11 years ago, the original purchase price of the equipment was
$750,000 and the operating cost has averaged $240,000 per year. Determine the
equivalent annual cost of the equipment if the company can now sell it for $234,000. The
company's MARR is 19% per year.
The equivalent annual cost of the equipment is determined to be $ 399506.4
A large city in the mid-West needs to acquire a street-cleaning machine to keep its roads looking nice year-round. A used cleaning vehicle will cost $85,000 and have a $20,000 market (salvage) value at the end of its five-year life. A new system with advanced features will cost $150,000 and have a $40,000 market value at the end of its five-year life. The new system is expected to reduce labor hours compared with the used system. Current street-cleaning activity requires the used system to operate 8 hours per day for 20 days per month. Labor costs $50 per hour (including fringe benefits), and MARR is 12% per year.The best estimate for the reduction of labor hours for the new system is 17% (compared with the used system). Investigate how sensitive the decision is to (a) changes in the MARR, (b) changes in the market value of the new system, and (c) the productivity improvement of the new system. Graph your results. Hint: Think incrementally!
A machine cost $315,000 to purchase. Fuel, oil, grease, and minor maintenance are
estimated to cost $53.50 per operating hour. A set of tires cost $16,000 to replace, and
their estimated life is 3,100 use hours. A $17,000 major repair will probably be required
after 6,200 hr of use. The machine is expected to last for 9,300 hr, after which it will be
sold at a price (salvage value) equal to 13% of the original purchase price. A final set of
new tires will not be purchased before the sale. How much should the owner of the
machine charge per hour of use, if it is expected that the machine will operate 3,100 hr
per year? The company's cost-of-capital rate is 7.25%.
Chapter 6 Solutions
Contemporary Engineering Economics (6th Edition)
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Consider the cash flows in Table P6.7 for the...Ch. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - The repeating cash flows for a certain project are...
Ch. 6 - Beginning next year, a foundation will support an...Ch. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - The Geo-Star Manufacturing Company is considering...Ch. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - Prob. 26PCh. 6 - Prob. 27PCh. 6 - Prob. 28PCh. 6 - Prob. 29PCh. 6 - Prob. 30PCh. 6 - Prob. 31PCh. 6 - Prob. 32PCh. 6 - Prob. 33PCh. 6 - Prob. 34PCh. 6 - Prob. 35PCh. 6 - Prob. 36PCh. 6 - Prob. 37PCh. 6 - Prob. 38PCh. 6 - Prob. 39PCh. 6 - Prob. 40PCh. 6 - Prob. 41PCh. 6 - Prob. 42PCh. 6 - Prob. 43PCh. 6 - Prob. 44PCh. 6 - Prob. 45PCh. 6 - Prob. 46PCh. 6 - Prob. 47PCh. 6 - Prob. 48PCh. 6 - Prob. 49PCh. 6 - Prob. 50PCh. 6 - Prob. 51PCh. 6 - Prob. 52PCh. 6 - Prob. 53PCh. 6 - Prob. 1STCh. 6 - Prob. 2STCh. 6 - Prob. 3STCh. 6 - Prob. 4ST
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- The initial cost of a pickup truck is $12,748 and will have a salvage value of $4,360 after five years. Maintenance is estimated to be a uniform gradient amount of $121 per year, with zero dollar for first year maintenance. The operation cost is estimated to be $0.3 per mile for 351 miles per month. If the interest rate is 12%, what is the annual equivalent cost (AEC) for the truck?arrow_forwardHand written solutions are strictly prohibitedarrow_forwardA large city in the midwest needs to acquire a street-cleaning machine to keep its roads looking nice year round. A used cleaning vehicle will cost $85,000 and have a $20,000 market (salvage) value at the end of its five-year life. A new system with advanced features will cost $150,000 and have a $40,000 market value at the end of its five-year life. The new system is expected to reduce labor hours compared with the used system. Current street-cleaning activity requires the used system to operate 8 hours per day for 20 days per month. Labor costs $50 per hour (including fringe benefits), and MARR is 12% per year. (11.2) a. Find the breakeven percent reduction in labor hours for the new system. b. If the new system is expected to beable toreduce labor hours by 17% compared with the used system, which machine should the city purchase?arrow_forward
- Operating and repair costs for equipment will be $15,000 per year for a 3-year warranty period, which required an initial investment of $300,000. Beginning in year 4, costs will climb at a rate of $2,500 per year. The equipment will bring $55,000 in income to the business, but starting after year 2. The equipment will be retired after year 10, with a salvage value of $30,000. Find the present worth of these costs if the firm’s interest rate is 12%. What is the annual cost of ownership?arrow_forwardWhat would be the annual worth on this investment?arrow_forwardGuardian is a national manufacturing company of home health care appliances. It is faced with amake-or-buy decision: a newly engineered lift can be installed in a car trunk to raise and lower awheelchair.Buy: The steel arm of the lift can be purchased for $0.60 per unit or make in house.Make: If manufactured on site, two machines will be required. Machine A is estimated to cost$18,000, have a life of 6 years, and a $2,000 salvage value. Machine B will cost $12,000, have a life of4 years, and a $-500 salvage value (carry-away cost). In addition, machine A will require anoverhaul after 3 years costing $3,000. The AOC for A is expected to be $6,000 per year and for B$5,000 per year. A total four operators will be required for the two machines at a rate of $12.50 perhour per operator. 1,000 units will be manufactured in a normal 8-hour period.Use MARR=15% to find the number of units to be manufacture each yeararrow_forward
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- not use ai pleasearrow_forwardFor a motor to operate a pump, a design engineer must choose the horsepower. Horsepower rating is a design characteristic that can vary from 10 to 40 horsepower. The motor will cost $120 per year to operate, plus $0.60 per horsepower. The running expenses of such motors will be $0.055 per horsepower-hour divided by the horsepower rating. Each year, 9,000 horsepower-hours will be required. Determine how much horsepower should be supplied to keep the overall yearly cost to a minimal. Demonstrate that your entire cost each year has been reduced.arrow_forward. A construction company is considering two possibilities for warehouse operations. Proposal 1 would require the purchase of a forklift for $5,000 and 500 pallets that cost $5 each. The average life of a pallet is assumed to be 2 years. If the forklift is purchased, the company must hire an operator for $9,000 annually and spend $600 per year on maintenance and operation. The life of the forklift is expected to be 12 years with a $700 salvage value. Alternatively, proposal 2 requires that the company hire 2 men to operate power driven hand trucks at a cost of $7,500 per man. One hand truck will be required at a cost of $900. The hand truck will have a life of 6 years with no salvage value. If the company's minimum attractive rate of return is 12%, which alternative should be selected? Use the annual equivalent method.arrow_forward
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