Basically I'm really stuck on one part of the my coursework which is the total bit. Ive looked everywhere but I still have not found a coding that works. Basically I have 2 combo box's (cboUrban , cboUk) and 2 add buttons for each (btnAdd1, btnAdd2) and a lstTrack box. The user selects a song from each category and adds the song by clicking on add track button for each combo box the song then appears on the lstTrack box where a total has to be displayed. However I can not find a code for this could you please help mee!! Each track costs 1.00

This is my coding so far for each button

Public Class frmMusicStars


Private Sub btnTrack1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTrack1.Click


If (cboUrban.SelectedIndex.ToString >= 0) Then
lstTracks.Items.Add(cboUrban.SelectedItem.ToString )

End If


End Sub

Private Sub btnTrack2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTrack2.Click


If (cboUk.SelectedIndex.ToString >= 0) Then
lstTracks.Items.Add(cboUk.SelectedItem.ToString)
End If

End Sub