private void btnOK_Click(object sender, EventArgs e)
        {

            decimal price = Convert.ToDecimal(txtPrice.Text);
            decimal taxRate = .08m;
            decimal salesTax = price * taxRate;
            decimal balanceDue = price + salesTax;

            //---now format as money without the $ showing. "n2" = number with 2 decimal places
            txtPrice.Text = price.ToString("n2");    //in case they type 23.5 I want 23.50
            lblTax.Text = salesTax.ToString("n2");
            lblBalDue.Text = balanceDue.ToString("n2");


        }