Stan Moneymaker needs 15 gallons of gasoline to top off his automobiles's gas tank. If he drives an extra eight miles (round trip) to a gas station on the outskirts of town, stan can save $0.10 per gallon on the price of gasoline. Suppose gasoline costs $3.00 per gallon and Stan's car gets 25 mpg for in town driving. Should stan make the trip to get less expensive gasoline? Each mile that Stan drives creates one pound of carbon dioxide. Each pound of C02 has a cost impact of $0.02 on the environment. What other factors (cost and otherwise) should Stan consider in his decision making?