Contribute correction: Betalen met munten en biljetten

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