Kelvara provides a hospital with maintenance of its imaging equipment for 4 years, for EUR 200,000 per year; each year of service is distinct. At the beginning of the third year, the parties approve two changes: first, the addition of maintenance of 3 new scanners for 2 years at EUR 40,000 per year, a price equal to the stand-alone selling price of that service; second, the extension of night-time interventions on the existing equipment, approved by the hospital but with the price increase not yet negotiated. Write a memo analysing the treatment of each of these changes.