Compact fluorescent lamps (CFLs) have become more popular in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent light bulb costs $0.45 and lasts 1,000 hours. A 15-watt CFL, which provides the same light, costs $3.40 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $0.121, which is about the national average. A kilowatt-hour is 1,000 watts for 1 hour. If you require a 10 percent return and use a light fixture 500 hours per year, what is the equivalent annual cost of each light bulb?(Negative amounts should be indicated by a minus sign.Do not round intermediate calculations andround your answers to 2 decimal places. (e.g., 32.16))

	Equivalent annual cost
60-watt incandescent light bulb	$
Compact fluorescent lamps	$
The answer is not 1.29 and 3.89