The price of the Product shall be mutually agreed between the parties as price confirmation, with the exception being only in the special circumstance when any party gives a prior written notice to the other party with explanation for the reason and necessity of the change in price. The Seller shall in advance send to Purchaser a price of Product, including the details of materials which will be used for producing the Product and the production process. The price of the Product includes all expenses up to delivery of the Product to the place as specified by Purchaser. After concluding the price according to the second sentence, both parties shall confirm the price in writing and such confirmation shall be deemed an integral part of the Agreement.