The paper presents an information system model that monitors the needs of information processing related to monitoring business functions of procurement, sales, storage and delivery of electronic products in wholesale where the price list and product catalog are the basis for business negotiations. The model serves as a basis for further supplementing the system with the bookkeeping part of the information system and the information system used by the human resources department, in order to facilitate easier decision-making, more flexible and faster operations, i.e. faster response to market needs, human resource management and ultimately more successful business operations. The goal of our system is that, based on the financial reports, the management is able to make decisions about introduction of new business functions and accompanying organizational activities, such as capacity expansion and introduction of new technological solutions. Relevant data and their interdependencies are defined, as well as operations performed on the data, all for the purpose of the aforementioned goal. Processes are modeled using data flow diagrams, formed into ER data models and translated into a relational model to facilitate understanding of their interdependence.