... assumptions.1 28 FINANCIAL MODELING WITH CRYSTAL BALL AND EXCELFIGURE 8. 4 Crystal Ball model for income statement in Sengupta2.xls. Cells J6,J7, J10,andJ12 are Crystal Ball assumptions, and I3 is a forecast.FIGURE ... uniform(1%,10%) Crystal Ball assumption based on information provided bymanagement on the possible variation they see for sales. Cells J7, J10,andJ12are uniform( 48% ,52%), uniform(27%,30%), and ... multiplicative random walk model, and introduce more models for simulating financial time series.Figure 8. 8 shows a forecast chart for the Crystal Ball model for 2002–2006 for the Vitex Corporation income...