The Consumer Financial Protection Bureau has put a price tag on the deterrent effect it says it will unleash by banning class-action waivers in consumer financial contracts: At least 1,200 additional class actions a year, costing more than $100 million a year in legal fees. The CFPB says that’s a good thing, but thousands of banks, credit-card issuers and other businesses that will be affected by the proposed new rule disagree. In letters filed with CFPB Director Richard Cordray before the official comment period closed yesterday, they use the agency’s own data to argue against the idea that class actions are the best way to resolve consumer disputes. Buried in the CFPB’s 300-plus-page report defending the rule is a difficult-to-read chart – it appears sideways on computer screens — adding up the expected costs to businesses from additional class actions in federal and state courts.