system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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be required to purchase balance of the Products required to be purchased pursuant to Section 5.1 of this Agreement. Distributor shall not be liable for any losses or damages incurred by Vendor as a result of Distributor's failure to meet its obligations under Section 5.1 of this Agreement. 6. PRICE; PAYMENT 6.1. Price Changes. The prices stated in Section 5.1 of this Agreement are subject to change. For any price change to take effect ninety (90) days notice must be given in order for the price change to apply; provided, however, the proposed price change must also apply to the Products for sale by Vendor outside the Territory. In the event that there is a price change required by Vendor that does not fall within the ninety (90) day notice period, both parties agree to discuss the nature of the increase in order to reach a mutually acceptable understanding. All the aforementioned price changes will not exceed, on a percentage term basis, any increase in the US retail selling price. -6- 6.2. Payment. Distributor agrees that all payments to Vendor for the Products shall be made by wire transfer in United States Dollars (U.S.$); provided, further, 6.2.1. For all Products to be delivered by Vendor directly to Distributor, the Price shall be paid by Distributor to Vendor within the earlier of: (1) one hundred eighty (180) calendar days from the date of delivery; or (2) thirty (30) calendar days after the sale or rental of the relevant Products by Distributor; and 6.2.2. For all Products to be delivered by Vendor directly to a third party purchaser of Distributor (as instructed pursuant to the relevant Purchase Order), the Price shall be paid by Distributor to Vendor within forty-five (45) days of Distributor's sale of the Products to the third party purchaser. 6.3. Notice of Discount Structure and Promotions. Vendor and Distributor each agree to provide the other party with written notice of its intent to offer a discount structure, rebate program or other promotion with respect to the sale of the Products, including the relevant time frame applicable to such discount structure, rebate program or promotion. 7. MARKETING MATERIALS 7.1. Development of Marketing Materials. Vendor and Distributor hereby agree to share marketing materials that are developed by either party for the Products covered by this Agreement, including, without limitation, any information, marketing or promotional materials for the Products, where, upon request, such marketing materials shall be delivered to the other party in hard copy and digital form, if available. Upon receipt of such marketing materials, the party may, in its sole discretion, elect to reject, use or modify such marketing materials. 7.2. Prior Approval of Product Claims. Distributor hereby agrees to obtain the prior written consent of Vendor prior to the use of any product claims with respect to the Products in its marketing materials. 7.3. Cost Sharing. With respect to cost-intensive promotional materials, such as video productions, infomercials and website development and maintenance, Vendor and Distributor hereby agree to share equally in the cost and expenses related to the development and preparation of such promotional materials; provided, however, any and all expenditures related to the development and preparation of such promotional materials shall be approved in advance by Vendor and Distributor. 8. PRODUCT RETURNS 8.1. Procedure. Distributor may return Products to Vendor for credit or full reimbursement, as the case may be, only pursuant to this Section 8. 8.2 Updated Products. Distributor may return to Vendor for credit against future purchases any Products for which a new version or upgrade has been produced and offered for sale; provided, however, the new version or upgrade must be of a material nature whereby the existing Products held by Distributor are considered obsolete. All Products must be returned undamaged, and all shipping charges -7- shall be paid by Distributor. This clause does not apply to any Products that have been in Distributor's inventory for more that one hundred and eighty (180) calendar days. 8.3. Damaged Products. Promptly upon the receipt of a shipment of Products, Distributor shall inspect the Products for damage or shortage. Within ten (10) calendar days of receipt of the shipment, Distributor shall notify Vendor of any damage or shortage. As soon as commercially practical after receipt of notice, Vendor shall make complete any shipment in short supply. Any Products damaged in shipment shall be returned to Vendor along with documentation of the damage within thirty (30) calendar days of receipt by Distributor, and Vendor will reimburse Distributor for the
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.

assistant: Not found.