As Nish research, it is one of our main areas of expertise. Based on our experiences in the country and taking into account the reality of the country, we define modern and traditional channels. We define sales points that have at least 2 cashiers and make their sales via handheld terminals as modern channels, and points with fewer than 2 cashiers as traditional channels. Over the past period of time, we have developed a number of special models based on our work.