(a) The summons of continuing garnishment for support shall be directed to the garnishee who shall be required to file a first answer no later than 45 days after service, which answer shall state what earnings were payable to the defendant from the time of service through and including the day of the first answer and the basis for the computation of same, including the rate of pay and hours worked, or salaries, commissions, or other basis of compensation.

(b) The garnishee shall accompany such initial answer with money of the defendant admitted in the answer to be subject to continuing garnishment for support. In computing the amounts subject to this article, the provisions of subsection (f) of Code Section 18-4-20 shall control.

(c) The money paid into court with the initial answer, after deduction for costs, shall be first applied to the periodic support payment accrued on a daily basis from the date of the affidavit of the plaintiff to the date of the initial answer. All sums in excess of such periodic payment shall be applied to the original arrearage. Original arrearage shall mean those arrears existing as of the date of the making of the plaintiff's affidavit, plus any amounts includable pursuant to subsection (b) of Code Section 18-4-134.