definiens: of Combination Products shall mean the gross sales mult1plied by a fraction, A/(A + B ), where " A - shall be the average per unit price of Licensed Product as sold alone in that country in the Territory and shall be the average per unit selling price in the Territory of each pharmaceutically active ingredient in the Combination Product other than Licensed Product . If B is available in the Territory, the least expensive presentation shall be used as reference for the calculation . The fraction, A/(A+B ), shall never be less than one - half ( 1/2 ) . If SUfficient information is not available to make this calculation, then Lundheck and Centaur shall mutually agree on a surrogaSe measurement 1.25 shall mean the development plan described in Sections 6.3 and 6.4 that is attached hereto, and made a part of this Agreement, as Annex B