Questão jurídica principal
Whether the appeal could be entertained despite non-payment of the ordered cost advance within the final deadline.
Decisão extraída
The appeal could not be entertained because the appellant failed to pay the cost advance within the non-extendable period, despite a warning of non-entry.
Fundamentação extraída
Under Art. 62(3) BGG, failure to pay the advance after a final grace period permits non-entry; the court therefore applied the simplified procedure under Art. 108(1) BGG.