The receipt number is the unique identification of the purchased goods, and the information of each sale will be displayed on the receipt, including detailed information such as sales time, sales quantity and sales amount. Therefore, sales information can be obtained by looking at the receipt number.

If you need to analyze a large number of receipts, you can input the data into a spreadsheet, and then analyze the data through formulas and charts, so as to better understand the changing trend, seasonality and other influencing factors of sales volume.