Mark and his wife Jean had recently built a country home on a one-acre lot. Initially overwhelmed by the size of the lawn, Mark arranged for Stanley, a neighbouring farmer, to cut the lawn with his riding mower. The first cut was difficult and time-consuming as there were many tall grasses and weeds to cut through. On this occasion, Stanley charged $300. One week later, Stanley cut the lawn again and charged Mark $200. Reflecting on the substantial expense this