You need to buy some chicken for dinner tonight You found an ad showing that the store across town has it on sale for 3 19 a pound which is cheaper than your usual neighborhood store which sells it for 3 39 a pound Is it worth the extra drive First determine what information you need to answer this question then click here to display that info along with other info How much chicken will you be buying 7 pounds How far away are the two stores My neighborhood store is 2 5 miles away and takes about 8 minutes The store across town is 8 5 miles away and takes about 21 minutes What kind of mileage does your car get It averages about 22 miles per gallon in the city How many gallons does your car hold About 16 gallons How much is gas About 3 68 gallon right now Going to the further store is cheaper O Going to the close store is cheaper The cheaper option saves you