Adding 2 values that together as decimals in c# asp.net

I have a value that I have got from gridview. I want to add another value and get a total. I am having trouble getting both to total.

The best I could do was "£10 + £2700 = £10£2700" not £2010 which is not what I wanted.

Here is my code.

            var total = (Label)gvConfirm.FooterRow.FindControl("lblGrndTotal");
            lblSubTotal.Text = total.Text;

            decimal pack = 10;
            lblPack.Text = packing;

            string gtotal = pack + total;