unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Spin, ExtCtrls, Buttons;
 
type
  TfrmList = class(TForm)
    cbxOne: TComboBox;
    lblItem: TLabel;
    lblPrice: TLabel;
    pnlHead: TPanel;
    pnlItem: TPanel;
    pnlPrice: TPanel;
    lblAmount: TLabel;
    pnlAmount: TPanel;
    lblPOne: TLabel;
    sedOne: TSpinEdit;
    Button1: TButton;
    cbxTwo: TComboBox;
    sedTwo: TSpinEdit;
    lblPTwo: TLabel;
    cbxThree: TComboBox;
    sedThree: TSpinEdit;
    lblPThree: TLabel;
    pnlTotal: TPanel;
    lblTotal: TLabel;
    lblVat: TLabel;
    lblFinal: TLabel;
    lblPTotal: TLabel;
    lblPVat: TLabel;
    lblPFinal: TLabel;
    bmbClose: TBitBtn;
    BitBtn1: TBitBtn;
    procedure cbxOneChange(Sender: TObject);
    procedure sedOneChange(Sender: TObject);
    procedure FormActivate(Sender: TObject);
    procedure cbxTwoChange(Sender: TObject);
    procedure sedTwoChange(Sender: TObject);
    procedure cbxThreeChange(Sender: TObject);
    procedure sedThreeChange(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  frmList: TfrmList;
  iPriceOne   : Integer;
  iPriceTwo   : Integer;
  IPriceThree : Integer;
  iPriceBread : Integer;
  iPriceCoke  : Integer;
  iPriceChips : Integer;
  iTotal      : Integer;
  rFinal      : Real;
  rVat        : Real;
  rVatTotal   : Real;
implementation
 
{$R *.dfm}
 
//=============================================================================
//cbxOneChange
procedure TfrmList.cbxOneChange(Sender: TObject);
begin
//Process
  //Bread
  if cbxOne.Text = 'Bread'
    then
      begin
       iPriceOne := iPriceBread * sedOne.Value;
       lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end;
  //Coke
  if cbxOne.Text = 'Coke'
    then
      begin
        iPriceOne := iPriceCoke * sedOne.Value;
        lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end;
  //Chips
  if cbxOne.Text = 'Chips'
    then
      begin
      iPriceOne := iPriceChips * sedOne.Value;
      lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end
end;
//=============================================================================
//sedOneChange
procedure TfrmList.sedOneChange(Sender: TObject);
begin
  //Bread
  if cbxOne.Text = 'Bread'
    then
      begin
       iPriceOne := iPriceBread * sedOne.Value;
       lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end;
  //Coke
  if cbxOne.Text = 'Coke'
    then
      begin
        iPriceOne := iPriceCoke * sedOne.Value;
        lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end;
  //Chips
  if cbxOne.Text = 'Chips'
    then
      begin
      iPriceOne := iPriceChips * sedOne.Value;
      lblPOne.Caption := 'R' + IntToStr(iPriceOne) + '.00';
      end
 
end;
//=============================================================================
//Form Activate
procedure TfrmList.FormActivate(Sender: TObject);
begin
//Variable Assignments
  iPriceBread := 5;
  iPriceCoke  := 10;
  iPriceChips := 8;
  rVat        := 14/100;
end;
//=============================================================================
//cbxTwoChange
procedure TfrmList.cbxTwoChange(Sender: TObject);
begin
//Process
  //Bread
  if cbxTwo.Text = 'Bread'
    then
      begin
       iPriceTwo := iPriceBread * sedTwo.Value;
       lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end;
  //Coke
  if cbxTwo.Text = 'Coke'
    then
      begin
        iPriceTwo := iPriceCoke * sedTwo.Value;
        lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end;
  //Chips
  if cbxTwo.Text = 'Chips'
    then
      begin
      iPriceTwo := iPriceChips * sedTwo.Value;
      lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end
end;
//=============================================================================
//sedTwoChange
procedure TfrmList.sedTwoChange(Sender: TObject);
begin
  //Bread
  if cbxTwo.Text = 'Bread'
    then
      begin
       iPriceTwo := iPriceBread * sedTwo.Value;
       lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end;
  //Coke
  if cbxTwo.Text = 'Coke'
    then
      begin
        iPriceTwo := iPriceCoke * sedTwo.Value;
        lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end;
  //Chips
  if cbxTwo.Text = 'Chips'
    then
      begin
      iPriceTwo := iPriceChips * sedTwo.Value;
      lblPTwo.Caption := 'R' + IntToStr(iPriceTwo) + '.00';
      end
 
end;
//=============================================================================
//cbxThreeChange
procedure TfrmList.cbxThreeChange(Sender: TObject);
begin
//Process
  //Bread
  if cbxThree.Text = 'Bread'
    then
      begin
       iPriceThree := iPriceBread * sedThree.Value;
       lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end;
  //Coke
  if cbxThree.Text = 'Coke'
    then
      begin
        iPriceThree := iPriceCoke * sedThree.Value;
        lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end;
  //Chips
  if cbxThree.Text = 'Chips'
    then
      begin
      iPriceThree := iPriceChips * sedThree.Value;
      lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end
end;
//=============================================================================
//sedThreeChange
procedure TfrmList.sedThreeChange(Sender: TObject);
begin
//Process
  //Bread
  if cbxThree.Text = 'Bread'
    then
      begin
       iPriceThree := iPriceBread * sedThree.Value;
       lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end;
  //Coke
  if cbxThree.Text = 'Coke'
    then
      begin
        iPriceThree := iPriceCoke * sedThree.Value;
        lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end;
  //Chips
  if cbxThree.Text = 'Chips'
    then
      begin
      iPriceThree := iPriceChips * sedThree.Value;
      lblPThree.Caption := 'R' + IntToStr(iPriceThree) + '.00';
      end
end;
//=============================================================================
//CalculatePriceButton
procedure TfrmList.Button1Click(Sender: TObject);
begin
  //Variable Assignments Button
  iTotal      := iPriceOne + iPriceTwo + iPriceThree;
  rFinal      := (iTotal * rVat) + iTotal;
  rVatTotal   := iTotal * rVat;
  //Process Button
  lblPTotal.Caption := 'R' + IntToStr(iTotal) + '.00';
  lblPVat.Caption   := 'R' + FloatToStrF(rVatTotal, ffFixed, 5, 2);
  lblPFinal.Caption := 'R' + FloatToStrF(rFinal, ffFixed, 5, 2);
end;
//=============================================================================
//Reset
procedure TfrmList.BitBtn1Click(Sender: TObject);
begin
  sedOne.Value   := 0;
  sedTwo.Value   := 0;
  sedThree.Value := 0;
  cbxOne.Clear;
  cbxTwo.Clear;
  cbxThree.Clear;
  lblPOne.Caption   := '';
  lblPTwo.Caption   := '';
  lblPThree.Caption := '';
  lblPTotal.Caption := '';
  lblPVat.Caption   := '';
  lblPFinal.Caption := '';
end;
 
end.