The need for P.I.s to consult with colleagues and disseminate new knowledge through the medium of scholarly meetings is an expected practice and an accepted cost in many projects. There must be a correlation between the project and the purpose of the meeting. Such costs may include transportation and per diem. Most sponsors restrict first class or business class tickets. If the project requires travel to various locations in order to perform the work, these costs should also be identified. An itinerary may be required if travel is a significant portion of the total cost. For example, travel to various localities for the purpose of data collection, sampling, or delivery of services or treatments.