Hi @zhexian ,
You need an expression Total=(subtotal on this page + all previous subtotals, so that the value becomes the start of the next subtotal, that is, the value + subtotal on the next page
By inserting a row, use the following expression: =RunningValue(Fields!YourField.Value, Sum, Nothing).
If I misunderstand what you mean, please feel free to correct me.
Best Regards,
Joy
If the answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our [documentation][2] to enable e-mail notifications if you want to receive the related email notification for this thread. [2]: https://learn.microsoft.com/en-us/answers/articles/67444/email-notifications.html