how can I store this in a variable named ptotal?
ptotal = Double.Parse(Me.txtt1.Text) + Double.Parse(Me.txtt2.Text) + Double.Parse(Me.txtt3.Text) + _
Double.Parse(Me.txtt4.Text) + Double.Parse(Me.txtt5.Text) + Double.Parse(Me.txtt6.Text) + _
Double.Parse(Me.txtt7.Text) + Double.Parse(Me.txtt8.Text) + Double.Parse(Me.txtt9.Text) + _
Double.Parse(Me.txtt10.Text) + Double.Parse(Me.txtt11.Text) + Double.Parse(Me.txtt12.Text) + _
Double.Parse(Me.txtt13.Text) + Double.Parse(Me.txtt14.Text) + Double.Parse(Me.txtt15.Text) + _
Double.Parse(Me.txtt16.Text) + Double.Parse(Me.txtt17.Text) + Double.Parse(Me.txtt18.Text) + _
Double.Parse(Me.txtt19.Text) + Double.Parse(Me.txtt20.Text) + Double.Parse(Me.txtt21.Text) + _
Double.Parse(Me.txtt22.Text) + Double.Parse(Me.txtt23.Text) + Double.Parse(Me.txtt24.Text) + _
Double.Parse(Me.txtt25.Text) + Double.Parse(Me.txtt26.Text) + Double.Parse(Me.txtt27.Text) + _
Double.Parse(Me.txtt28.Text) + Double.Parse(Me.txtt29.Text) + Double.Parse(Me.txtt30.Text) + _
Double.Parse(Me.txtt31.Text) + Double.Parse(Me.txtt32.Text) + Double.Parse(Me.txtt33.Text) + _
Double.Parse(Me.txtt34.Text) + Double.Parse(Me.txtt35.Text) + Double.Parse(Me.txtt36.Text) + _
Double.Parse(Me.txtt37.Text) + Double.Parse(Me.txtt38.Text) + Double.Parse(Me.txtt39.Text) + _
Double.Parse(Me.txtt40.Text) + Double.Parse(Me.txtt41.Text) + Double.Parse(Me.txtt42.Text) + _
Double.Parse(Me.txtt43.Text) + Double.Parse(Me.txtt44.Text) + Double.Parse(Me.txtt45.Text) + _
Double.Parse(Me.txtt46.Text) + Double.Parse(Me.txtt47.Text) + Double.Parse(Me.txtt48.Text) + _
Double.Parse(Me.txtt49.Text) + Double.Parse(Me.txtt50.Text)