Contribute correction: Control de Stocks

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