When you want to calculate differences in a spreadsheet, you can select “Create Table Calculation” and then “Difference from…” from the column header menu.
There are several options available as submenus, and when you want to find the difference from the previous value, you would use “Previous”.
Another method is to use the “AI Prompt” feature, which allows you to process data with Japanese instructions, and this can also calculate differences. Example usage:
Calculate the difference from the previous value of sales for each customer
For more details about AI prompts, please refer to the following: 自然言語でデータを加工できるAI プロンプト機能の紹介