She said that when the company had switched to Pricewaterhouse Coopers from Andersen, PwC advocated a different treatment for some of its accounts. These involved the treatment of certain costs associated with the state of Ohio's transition from a highly regulated to a more competitive energy market over the next few years. 'There were differing interpretations of the methodology,' Baird said. PwC also had to re-audit the accounts for 2000 and 2001.