4. Littrell's Nursery needs a new irrigation system. System one will cost $145,000, have annual maintenance costs of $10,000, and need an overhaul at the end of year six costing $30,000. System two will have first year maintenance costs of $5,000 with increases of $500 each year thereafter. System two would not require an overhaul. Both systems will have no salvage value after 12 years. If Littrell's cost of capital is 4%, using annual worth analysis determine the maximum
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A 200-acre suburban neighborhood in Santa Fe, New Mexico must design a storage pond for the 100-year storm of duration 10 hours. Infiltration occurs over 6% of the watershed and is described by a Horton equation with constants fc = 0.05 in/hr, f0 = 0.15 in/hr, and k = 0.31 hr. Interception and abstraction equal 5 acre-feet combined. Because Santa Fe is so arid, evapotranspiration occurs during the storm and equals 20% of the precipitation. A storm sewer can carry out only 12.1 ft^3/sec before it overflows. What depth (ft) must a 2-acre detention pond be to hold the rainfall excess (runoff, Q)? (Hint: start by writing the water balance for the rainfall. Then calculate the volume for each component as generated from the rainfall). a) What is the expected intensity of the design storm? (in/hr) b) What is the total interception and abstraction volume? (ft^3) c) What is the total infiltration volume? (ft^3) d) What is the depth of the rainfall excess (runoff) storage pond? (ft) show work please
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Botanical Harvest has several herb extractor evaporators that were purchased four years ago at a price of $20,000 (you can ignore inflation). These machines currently require annual maintenance costs of $2,000. However, the maintenance agreement with the manufacturer expires at the end of two years and Botanical Harvest expects annual maintenance to increase to $8,000 per year thereafter. The machines could be sold, as is. for $8,000, but there value will decline to $3,500 at the end of two years. At the end of year 6, the machine's useful life will be over and they will be disposed of as valueless scrap. Botanical Harvest is considering replacing these evaporators with a new machine that will accomplish the same job. The cost of the new machine is $25,000 and the manufacturer offers an 8-year maintenance contract of $1,000 per year. This machine will have an 8-year life and be worthless scrap at the end. Assume both all of this equipment (new & old) is depreciated using 7-yr MACRS and has a tax rate of 35%. The firm has a beta of 0.5, the risk-free rate is 3%, and the market risk premium is 8%. Given this information, and using an equivalent annual cost analysis, when should Klondike replace its evaporators? Hint: Consider three basic scenarios: replace now, replace in two years, and replace in 6 years.
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