Payments received shall be applied against outstanding charges in the following order: interest and finance charges (where outlined in contractual agreement), late payment penalty, then charges listed on the invoice. Overpayments may be applied to other invoices for the same customer. If no other outstanding invoices exist, then the overpayment shall be refunded. Refunds will be issued within two weeks of the receipt of the overpayment. [Ord. 4583 § 1, 2022; Code 1970 § 3.300.030.]