Final answer:
Barter syndication is an arrangement where syndicated programs are provided to local stations at a reduced cost with some advertising slots already sold to national advertisers.
Step-by-step explanation:
The arrangement described in the question is known as barter syndication. This is a common practice in the television industry where syndicated programs are offered to local stations either for free or at a reduced rate. In exchange, some advertising time is pre-sold to national advertisers. Essentially, the local stations get content without bearing the full cost, and the producers of the show as well as the national advertisers benefit from having their advertisements aired across different markets. Stations running syndicated shows often supplement the national ads with local advertising, creating a revenue mix.