41.   Ad sales could be affected somewhat by Sydney ratings, so low NBC had to add extra commercials to satisfy sponsors.

42.   It also comes as some major media companies have cited slow ad sales as they have cut jobs to save money.

43.   The economic slowdown could hurt ad sales, already difficult because of the uncertainty over which systems will carry the network next year.

44.   With business recently booming for TV ad sales, the government set up an arrangement where networks would get credit for anti-drug messages incorporated in their shows.