If a guardian in good faith has spent money from the income and corpus of the estate of the ward for the ward's support and maintenance and the expenditures exceed the monthly allowance authorized by the court, the guardian shall file a motion with the court requesting approval of the expenditures. The court may approve the excess expenditures if:
(1) the expenditures were made when it was not convenient or possible for the guardian to first secure court approval;
(2) the proof is clear and convincing that the expenditures were reasonable and proper;
(3) the court would have granted authority in advance to make the expenditures; and
(4) the ward received the benefits of the expenditures.