Hi techlandandyzhang,
Thanks for the update.
Based on your update you have mentioned that you have not used the grouping in your Grid application. By default, in EJ2 Grid, it is not feasible to add the aggregates in between data rows of the Grid component without using the grouping with group footer aggregates and if you use the grid footer aggregates, then the aggregates are displayed at the bottom of the Grid rows only.
So, it is not feasible to achieve your requirement as per the attached screenshot. However, based on your attached screenshot we suspect that you have used TreeGrid in your application. So please confirm that you have used the TreeGrid in your application, based on that we will validate further on your requirement. Please refer the below TreeGrid documentation for your reference.
UG & SB Links:
regards,
Ajith G.