AerolineaFrba.Compra.Form2.calcularImporte C# (CSharp) Method

        private string calcularImporte()
        {
            string origen = (((this.anterior as Compra.Form4).anterior as Compra.Form3).anterior as Compra.Form1).origen;
            string destino = (((this.anterior as Compra.Form4).anterior as Compra.Form3).anterior as Compra.Form1).destino;

            SQLManager.ejecutarQuery("select * from [ABSTRACCIONX4].importePasaje('" + origen + "', '" + destino + "')", dgImporte);

            return dgImporte.Rows[0].Cells["Importe"].Value.ToString();
        }