This is a course material (slides in pdf format) from the book 'Investment Decision Making For Firm and Project Valuation.' The book is originally in Spanish and is untitled as 'Decisiones de inversion. Para la valoracion financiera de proyectos y empresas.' Chapter 5 deals with how to prepare and use information to make forecasts to be used in forecasting financial statements. In this chapter we show step by step how to proceed to make proper forecasts in order to have the future financial statements. In Chapter 6 we deal with the construction of the forecasted financial statements based on the tables calculated in Chapter 5.