Correspondence issued by the General Accounting Office with an abstract that begins "During its review of the Navy's aviation spare parts billing transactions, GAO compared the prices that customers were billed for to the prices they should have paid according to the parts catalog maintained by the Naval Inventory Control Point-Philadelphia. GAO found thousands of transactions in which the customers' price did not match the catalog price. Also, thousands of additional transactions were discovered in which key information used to generate accurate customer bills was missing. On the basis of these findings, GAO concludes that the Navy may be incorrectly reporting its sales of aviation spare parts."