an audit of Licensee's records and books of account reveals that Licensee has underpaid the fees due under this Agreement to Licensor for the period under audit, Licensee shall pay to Licensor promptly the amount of the underpayment. If the amount of underpayment for the period under audit exceeds five percent (5%) of the total amount owed during such period, Licensee shall reimburse Licensor for all costs and expenses incurred by Licensor in connection with performing the audit. ARTICLE 12 LIMITED WARRANTIES Section 12.1 NO DEFECTS. For twelve (12) months after delivery of the Master Copy of each Licensed Product to Licensee, Licensor warrants that the media in which the Licensed Products are stored shall be free from defects in materials and workmanship, assuming normal use. Licensee may return any defective media to Licensor for replacement free of charge during such twelve (12) month period. Section 12.2 PERFORMANCE. For twelve (12) months after delivery of any Licensed Product to a Customer, whether Customer receives such Licensed Product from Licensee or a Redistributor, Licensor warrants that each Licensed Product will perform as described in the applicable Documentation. If Licensee or any Redistributor or Customer discovers any errors or discrepancies in the Licensed Products from the Documentation during the twelve (12) month warranty period, Licensee shall notify Licensor promptly in writing of such error or discrepancy in sufficient detail to enable Licensor to recreate the error or discrepancy. If the error or discrepancy is found by Licensee prior to the expiration of the ten (10) day evaluation period set forth in Section 4.2, such evaluation period shall be extended ten (10) days from the date of receipt by Licensee of the corrected Licensed Product from Licensor. Section 12.3 DUTIES UNDER WARRANTY. If Licensee or any Redistributor or Customer discovers any error in