Economical solar energy and energy from fusion have been identified as two of engineering's grand challenges. While work continues on these grand challenges, conservation of energy from non-renewable sources is vital. On a practical level, installing low thermal emissivity windows (low-e windows) on buildings can contribute to energy conservation. Installing low-e windows on a small office building is estimated to cost $9,000. The windows are expected to last 8 years and have no salvage value at that time. The energy savings from the windows are expected to be $2,775 in the 1st year. After the 1st year, the savings are expected to increase by $125 each year due to escalating fossil fuel costs. MARR is 12% per year and annual worth is the preferred measure of economic worth. Are the low-e windows an economically attractive investment?
The annual worth of installing the low-e windows is $
Carry all interim calculations to 5 decimal places and then round your final answer to a whole number. The tolerance is +1.
The low-e window investment attractive.

Shrieves casting company is considering adding a new line to its product mix, and the capital budgeting analysis is being conducted by sidney johnson, a recently graduated mba. the production line would be set up in unused space in the main plant. the machinery’s invoice price would be approximately $200,000, another $10,000 in shipping charges would be required, and it would cost an additional $30,000 to install the equipment. the machinery has an economic life of 4 years, and shrieves has obtained a special tax ruling that places the equipment in the macrs 3-year class. the machinery is expected to have a salvage value of $25,000 after 4 years of use. the new line would generate incremental sales of 1,250 units per year for 4 years at an incremental cost of $100 per unit in the first year, excluding depreciation. each unit can be sold for $200 in the first year. the sales price and cost are both expected to increase by 3% per year due to inflation. further, to handle the new line, the firm’s net working capital would have to increase by an amount equal to 12% of sales revenues. the firm’s tax rate is 40%, and its overall weighted average cost of capital, which is the risk-adjusted cost of capital for an average project (r), is 10%. define “incremental cash flow.” (1) should you subtract interest expense or dividends when calculating project cash flow?