In the Accounts Receivable Age report, you can see the total outstanding receivables by the customer. More specifically, you can sort as you wish, namely by due date or invoice creation date.
How to see the age of receivables:
Go to Laporan menu -> Click Laporan -> Select Umur Piutang-> Enter Filter Tanggal (Jatuh Tempo/Faktur) -> Enter Urutan (Total/Pelanggan) -> Click Cetak.