Total output in the GridView footer row

//Global Declaration
Dim units22 as Integer=0
Dim units2 as Integer=0

//Grid Events
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

        If e.Row.RowType = DataControlRowType.DataRow Then

            units22 = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "Branches")) //Coloumn name
            units2 = units22 + units2

        End If

        If e.Row.RowType = DataControlRowType.Footer Then

            e.Row.Cells(6).Text = "Total"
            e.Row.Cells(7).Text = units2.ToString().Trim()

            e.Row.Font.Bold = True

        End If

    End Sub

Output:

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