Before buying a house, Dean and Donna Testa hired Ground Systems, Inc. (GSI), to inspect and describe the sewage and water disposal system. GSI reported that a split sewage and water disposal system was in place with a watertight septic tank, a wastewater tank, a distribution box, and a leach field. The Testas bought the house. Later, Dean Testa noticed that the system was not as GSI described; there was no distribution box or leach field. Furthermore, there was only one tank, and the tank was not watertight. The Testas arranged for the installation of a new system and sold the house. Assuming that GSI is liable for a breach of contract, what is the measure of damages?