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Webhierarchicaldatagrid - changes cell on change another cell in the same row


I am working in a Webhierarchicaldatagrid and I need to change a cell after change another cell in  the same row. Below is a screenshot to clarify what I mean. I need to change a cell in the Amount column then the cell in the Total cost should be auto calculated and below the grid there is the sub total should be calculated to.

I tried to do this through RowUpdated event as shown below, but the issue is that the event is not fired after change any editable cell in the Webhierarchicaldatagrid, below is my code to create the RowUpdated event for my Webhierarchicaldatagrid  which is named (UG1).

And finally, below is the Webhierarchicaldatagrid in the aspx file.

Knowing that my application in a webforms application using visual basic as backend and the infragistics version is "Infragistics45.Web.v22.1, Version=22.1.20221.11".