Here are details of Ex-Sen. Fred Thompson's advertising buy in South Carolina.

It's the largest single expense of his campaign so far.

His 60-second biographical ad will air in Charleston, Columbia, Florence, and Greenville beginning today ... and lasting through next Monday.

The total cost, according to a GOP media buyer: $230,105.

Thompson is in SC tomorrow for a speech at the Citadel and retail politicking in Myrtle Beach.

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