DuPont 2007 Annual Report Download - page 60

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Report of Independent Registered Public Accounting Firm
To the Stockholders and the Board of Directors of
E. I. du Pont de Nemours and Company:
In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income,
stockholders’ equity and cash flows present fairly, in all material respects, the financial position of E. I. du Pont de
Nemours and Company and its subsidiaries at December 31, 2007 and December 31, 2006, and the results of their
operations and their cash flows for each of the three years in the period ended December 31, 2007 in conformity with
accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial
statement schedule listed in the index appearing under Item 15(a) (2) presents fairly, in all material respects, the
information set forth therein when read in conjunction with the related consolidated financial statements. Also in our
opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of
December 31, 2007, based on criteria established in Internal Control – Integrated Framework issued by the
Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is
responsible for these financial statements and financial statement schedule, for maintaining effective internal
control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting,
included in “Management’s Reports on Responsibility for Financial Statements and Internal Control over Financial
Reporting” appearing on page F-2. Our responsibility is to express opinions on these financial statements and
financial statement schedule and on the Company’s internal control over financial reporting based on our integrated
audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight
Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance
about whether the financial statements are free of material misstatement and whether effective internal control over
financial reporting was maintained in all material respects. Our audits of the financial statements included
examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by management, and evaluating the
overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an
understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and
testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our
audits also included performing such other procedures as we considered necessary in the circumstances. We
believe our audits provide a reasonable basis for our opinions.
As discussed in Note 1 to the consolidated financial statements, the company changed the manner in which it
accounts for uncertainty in incomes taxes in 2007.
A company’s internal control over financial reporting is a process designed to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles. A company’s internal control over financial reporting
includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance
with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s
assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.
Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become
inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may
deteriorate.
PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
February 18, 2008
F-3