RIGHT TO AUDIT. Xxxxxxx shall keep accurate accounts and records of all transactions relating to an Order in accordance with generally accepted accounting principles for a period of at least 7 years after receipt of the final payment with respect to an Order (the “Audit Period”). Upon giving 30 calendar days prior written notice, at any time during normal business hours during the Audit Period, Thermon shall permit Customer, at Customer’s own costs, and its authorized representatives for which Thermon has provided services, to review Thermon’s records relating to the services provided, as may be necessary to audit and verify the completeness and accuracy of any invoice.