For the purposes of this article, “nonfederal financial support” means the total sum of revenues from nonfederal sources derived by a licensee in a fiscal year and reported in an audited financial statement thereof, and does not include in-kind services, funds received for the purpose of constructing or remodeling a building, funds received from other public broadcasting stations or networks for the production of programming or for other services to those stations or networks, or funds provided to stations under this chapter. Interest income generated from any source may be included in “nonfederal financial support.”