Rex Carr could pay $ 10 for a shovel that lasts one year and pay $ 5 a car to his brother Scoop to bury the cars, or he could buy a low-quality car smasher that costs $ 200 a year to own and that smashes cars at a cost of $ 1 per car. If it is also possible for Rex to buy a high-quality hydraulic car smasher that cost $ 300 per year to own and if with this smasher he could dispose of cars at a cost of $ .75 per car, it would be worthwhile for him to buy this highquality smasher if he planned to dispose of