From the article on the previous page:

In the case of “The Clone Wars” he is financing the series himself and charging Time Warner licensing fees to distribute the film and broadcast the show. (A person with knowledge of the company’s animation operations, speaking anonymously to avoid offending Mr. Lucas, said that the earliest episodes of “The Clone Wars” probably cost $750,000 to $1.5 million each.

Definitely under 5 million. Add the cost of prints and distribution. A pretty cheap exercise.