sentences:  Since Sloan Foundation approval was dependent on promises of contributions from additional sources, and projects were encouraged to bring additional resources on board during their operation, the Foundation funds committed were effectively leveraged many times to provide a much more substantial program than would otherwise have been possible.As core infrastructure components, the Foundation also supported the Census' International Scientific Steering Committee and Secretariat, the U.S. National Committee, and an Education and Outreach Network to lift the project's visibility and engage other nations and organizations.The Census was ultimately estimated to have cost US $650 million, of which the Sloan Foundation contributed US $75 million with the remainder supplied by a large number of participating institutions, countries, and national and international organizations in the form of both direct and in-kind contributions.