Two partners own together a small landscaping business in North Carolina, called Summer Lawn Care. They have been specializing in summer grass seeding, installation, and maintenance. Recently, the partners acquired special technology and know-how for winter grass installations and maintenance. They also added a tree cutting service as recent storms in the area had caused demand for this service to soar. One of the partners insists that the name of the business should change to Lawn and Tree Care, so that it better reflects the range of services and, thus, generates more customer interest, and thus contracts. The second partner wants to keep the old name and argues, "We have already paid for business cards, vehicle paint, signage, and ads in Yellow Pages". Evaluate the arguments of the two partners. Explain and illustrate their points by identifying the relevant and irrelevant costs for this decision.