Issues

(1) What caused the calls in question to be billed at AT&T casual rates rather than the rates specified in the contract?

(2) Under the circumstances of this case, did PCS violate the applicable tariff by billing these calls at rates other than those specified in the contract?

(3) If PCS violated the tariff by billing these calls at rates other than those specified in the contract, what is the total amount of overcharges reimbursable to XYZ?