Summery row in data gird view and showing value on label from table cell value

Dear Friends,

I have two issues to be solved

1) I need to get a summery ( total ) row for data gird view, which show total quantity and total amount as last row (Please see the screen shot) 

2. Please see the table screen shot from my database. I need to print the last value in TID column from database table (in this example TID no is 12)  in label1 by clicking button2 on vb.net salesmysql form.

so far my code here is

Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
        conn.Open()
        Dim ds As New DataSet
        Dim da As New MySqlDataAdapter("select TID from mydatabase.tbltran;", conn)
        da.Fill(ds, "mydatabase.tbltran")

    End Sub