Light emitting diodes (LED) light bulbs have become required in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent light bulb costs $.54 and lasts 1,000 hours. A 15-watt LED, which provides the same light, costs $3.85 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $.130. A kilowatt-hour is 1,000 watts for 1 hour. If you require a return of 10 percent and use a light fixture 500 hours per year, what is the equivalent annual cost of each light bulb? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) 60-watt incandescent light bulb LED light bulb You are evaluating two different silicon wafer milling machines. The Techron I costs $264,000, has a three-year life, and has pretax operating costs of $71,000 per year. The Techron Il costs $460,000, has a five-year life, and has pretax operating costs of $44,000 per year. For both milling machines, use straight-line depreciation to zero over the project's life and assume a salvage value of $48,000. If your tax rate is 22 percent and your discount rate is 12 percent, compute the EAC for both machines. (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) Techron Techron 11 Which machine do you prefer? Techron Techron