"I don't think people realize the extent to which TV networks are hurt when they carry public broadcasting. I think the estimate is that they lose a half-million dollars for a half day's programming"

This quote by Roone Arledge is referring to the financial effect that television networks experience when they air public broadcasting. Arledge is recommending that networks lose a significant amount of cash when they air public broadcasting, estimating that it costs them a half-million dollars for a half day's programs. This recommends that networks are not familiar with the financial problem that public broadcasting places on them, which they may not be aware of the level to which they are being harmed by airing it. This quote highlights the importance of networks understanding the monetary implications of airing public broadcasting, and the need for them to be aware of the expenses associated with it.