public void displaySolutionForm(CalculatorFormData data)
        {
            // Create new SolutionForm instance and pass the form data
            Form solutionForm = new SolutionForm(data);

            solutionForm.Show();
        }
        private void butt_Calculate_Click(object sender, EventArgs e)
        {
            string message = "";
            int    item1Cost, item1Quantity, item2Cost, item2Quantity, item3Cost, item3Quantity;
            int    item1Total = 0, item2Total = 0, item3Total = 0;
            int    grandTotal, grandTotalPerPerson;
            bool   pass = true;

            ResetLabelColors();

            if (rb_Three.Checked)
            {
                //item three calcs
                if (!int.TryParse(tb_Cost3.Text, out item3Cost))
                {
                    lbl_Cost3.ForeColor = Color.Red;
                    tb_Cost3.Focus();
                    message += "Please enter cost of item three.\n";
                    pass     = false;
                }
                if (!int.TryParse(tb_Quantity3.Text, out item3Quantity))
                {
                    lbl_Quantity3.ForeColor = Color.Red;
                    tb_Quantity3.Focus();
                    message += "Please enter quantity of item three.\n";
                    pass     = false;
                }

                item3Total  = item3Cost * item3Quantity;
                item3Total -= (int)(item3Total * (nud_Discount3.Value / 100));
            }

            if (rb_Two.Checked || rb_Three.Checked)
            {
                //item two calcs
                if (!int.TryParse(tb_Cost2.Text, out item2Cost))
                {
                    lbl_Cost2.ForeColor = Color.Red;
                    tb_Cost2.Focus();
                    message += "Please enter cost of item two.\n";
                    pass     = false;
                }
                if (!int.TryParse(tb_Quantity2.Text, out item2Quantity))
                {
                    lbl_Quantity2.ForeColor = Color.Red;
                    tb_Quantity2.Focus();
                    message += "Please enter quantity of item two.\n";
                    pass     = false;
                }

                item2Total  = item2Cost * item2Quantity;
                item2Total -= (int)(item2Total * (nud_Discount2.Value / 100));
            }

            //item one calcs
            if (!int.TryParse(tb_Cost1.Text, out item1Cost))
            {
                lbl_Cost1.ForeColor = Color.Red;
                tb_Cost1.Focus();
                message += "Please enter cost of item one.\n";
                pass     = false;
            }
            if (!int.TryParse(tb_Quantity1.Text, out item1Quantity))
            {
                lbl_Quantity1.ForeColor = Color.Red;
                tb_Quantity1.Focus();
                message += "Please enter quantity of item one.\n";
                pass     = false;
            }

            item1Total  = item1Cost * item1Quantity;
            item1Total -= (int)(item1Total * (nud_Discount1.Value / 100));

            if (pass)
            {
                //Final Math
                grandTotal          = item1Total + item2Total + item3Total;
                grandTotalPerPerson = grandTotal / (int)nud_Roomates.Value;

                Totals totals = new Totals {
                    GrandTotal = grandTotal, GrandTotalPerPerson = grandTotalPerPerson
                };

                //print to solution window
                FormCollection fc = Application.OpenForms;
                foreach (Form f in fc)
                {
                    if (f.GetType() == typeof(SolutionForm))
                    {
                        f.Close();
                        break;
                    }
                }

                SolutionForm sf = new SolutionForm();
                sf.SetTotals(totals);
                sf.Show();
            }
            else
            {
                MessageBox.Show(message, "Error");
            }
        }