it is from september, 2004, and it rejects the claim that usps says overpaid the retirement system. it claims that the request for $75 billion in overpayment is not founded, and should not be granted by the congress. furthermore, the letter includes a statement from the board of actuaries in which it declares that opm has appropriately and accurately determine the financial obligations for the postal service. mr. chair, i ask unanimous consent to submit this letter for the record, and mr. donahoe, what is your response to the letter? >> here is my response. we have differing opinions. we have estimated that we have overpaid $75 billion. overpaid $75 billion. the postal regulatory commission has looked a the same information, and their outside information, and their outside actuaries have estimated that we paid some of -- overpaid somewhere between $50,000,000,000.50 $5 billion. $50,000,000,000.50 $5 billion. >> -- $50 billion, and $55 billion toward >> so, you disagree part >> i disagree with the butter. >> the postal regulatory commission did what we believe it is in an objective a