10. Higher costs today can sometimes lead to higher savings in the future. An LED bulb costs

$30 and has a lifespan of 30,000 hours. In that time, it uses 300 kWh of electricity. A halogen bulb costs $5 and has a lifespan of 1,000 hours. In that time, it uses 60 kWh of electricity. Assuming that electricity costs 20 cents per kWh, how much will one save by using an LED bulb over its lifespan?