Facil...
Public Function HallarTotal() As Double
Dim total1 As Double
Dim a As Short
For a = 0 To Me.LvDetalle.Items.Count - 1
total1 = total1 + Me.LvDetalle.Items(a).SubItems(7).Text
Next
Return total1
End Function
y despues ...de calcular los costos
Me.LblTotalDolares.Text = Format$(HallarTotal(), "#,##0.00")
Astrin...!!!