The CRA Dispute is a whole charge for the process, not per credit bureau.
For Ex: “If you dispute 10 trade lines to 3 different reporting agencies the CRA Dispute Fee would be $30.00 for that particular consumer. If we dispute 2 tradelines items in only to Credit Reporting Agencies the fee would still be $30.00 to dispute.”
The $30.00 dispute fee covers is unlimited trade lines in all three Credit Reporting Agencies.