Contribute correction: Lagerbestandsverwaltung

  ______   _    _    _____     _    _   
 /_   _// | || | || |  __ \\  | || | || 
   | ||   | || | || | |  \ || | || | || 
  _| ||   | \\_/ || | |__/ || | \\_/ || 
 /__//     \____//  |_____//   \____//  
 `--`       `---`    -----`     `---`