definiens: shall mean the difference for a business unit between : ( i ) Net Income derived from -18- the use or sale of a Product to the extent it is at tributable to use of Agreement Compounds or Program Technology, and ( ii ) the Net Income without the use or sale of Product but including other goods which it is expected would have been sold by the business unit if the Product were not available, in each case det ermined in accordance with Generally Accepted Accounting Princ iples ( GAAP ), on a consistent basis . By way of exam ple and without limitation, in determining the overall Added Value received by TDCC, where a Product is a substitute for an existing product sold by TDCC, th e parties shall consider changes in sales volume re sulting from Product, Product pricing and Product developme nt, production and commercial costs ( e.g., due to c hanges in raw materials costs, capital costs, processing c osts, yield, market development costs, research cos ts, royalties payable to Third Parties and claims of third partie s ), in each case, attributable to the use or sale o f the Products or their manufacture . In addition, it is understood th at if a Product uses technology developed by TDCC o r its Affiliates outside of the Research Program or acqui red from a Third Party, e.g., a second catalyst in a dual catalyst system to manufacture a Product where the first catalyst is an Agreement Compound, Added Valu e shall, where appropriate, take into account the con tributions of the Agreement Compounds and Program Technology relative to the other technology in dete rmining the Net Income derived from use or sale of the Product as a result of the Agreement Compounds and Program Technology . Once the projected Added Value related to the particular Product has been determin ed, the parties will then decide on the royalty rat e to be paid by TDCC on Net Sales of such Product so as to provi de Symyx twenty - five percent ( 25 % ) of the Added Val ue projected to be realized by TDCC or its Affiliates over the period during which royalty payments are t o be paid