Article 4
1. The exact amount of aid to be recovered should be calculated by Hungary on the basis of an appropriate simulation of the wholesale electricity market as it would have stood if none of the Power Purchase Agreements referred to in Article 1(1) had been in force since 1 May 2004. 2. Within six months following notification of this Decision, Hungary shall calculate the amounts to be recovered on the basis of the method referred to in paragraph 1 and submit to the Commission all relevant information with regard to the simulation, notably its results, a detailed description of the methodology applied, and the set of data used to carry out the simulation.