The judge shall inquire into the financial condition of such person and of the parent, parents, guardian, or other person charged with his support and maintenance, and if he finds such person, parent, parents, guardian, or other person able, in whole or in part, to pay the expense of such transfer, he shall make a further order requiring such person, parent, parents, guardian, or other person to repay to the county such part, or all, of such expense of transfer as, in the opinion of the court, is proper. Such repayment shall be made to the probation officer who shall keep suitable accounts of such expenses and repayments and shall deposit all such collections in the county treasury.