Deferred mobilisation costs SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES continued

Lampiran 529 Schedule CATATAN ATAS LAPORAN KEUANGAN INTERIM KONSOLIDASIAN ENAM BULANAN YANG BERAKHIR PADA TANGGAL 30 JUNI 2011 DAN 2010 Dinyatakan dalam jutaan Rupiah, kecuali dinyatakan secara khusus NOTES TO THE CONSOLIDATED INTERIM FINANCIAL STATEMENTS FOR THE SIX MONTHS ENDED 30 JUNE 2011 AND 2010 Expressed in million Indonesian Rupiah, unless otherwise stated 3. KAS DAN SETARA KAS

3. CASH AND CASH EQUIVALENTS 30

JuniJune 31 Desember 2011 December 2010 Tidak diaudit Diaudit Unaudited Audited Kas Cash on hand Rupiah 16,007 11,702 Rupiah Kas di bank – pihak ketiga Cash in banks – third parties Rupiah Rupiah PT Bank Internasional - - PT Bank Internasional Indonesia Tbk. 76,826 18,575 Indonesia Tbk. PT Bank Danamon - - PT Bank Danamon Indonesia Tbk. 1,357 1,748 Indonesia Tbk. - Bank lainnya 509 426 Other banks - Jumlah rekening Rupiah 78,692 20,749 Total Rupiah accounts Dolar AS US Dollars PT Bank Internasional - - PT Bank Internasional Indonesia Tbk. 733,766 272,894 Indonesia Tbk. - Standard Chartered Bank 168,211 215,992 Standard Chartered Bank - PT Bank Danamon - - PT Bank Danamon Indonesia Tbk. 147,227 432,848 Indonesia Tbk. PT Bank Sumitomo Mitsui - - PT Bank Sumitomo Mitsui Indonesia 3,714 4,122 Indonesia - Bank lainnya 5,306 728 Other banks - Jumlah rekening Dolar AS 1,058,224 926,874 Total US Dollar accounts Jumlah kas di bank Total cash in banks - pihak ketiga 1,136,916 947,623 - third parties Deposito berjangka Time deposits Rupiah Rupiah PT Bank Internasional - - PT Bank Internasional Indonesia Tbk. 30,148 - Indonesia Tbk. Jumlah rekening Rupiah 30,148 - Total Rupiah accounts Dolar AS US Dollars PT Bank Internasional - - PT Bank Internasional Indonesia Tbk. 620,243 332,337 Indonesia Tbk. - Standard Chartered Bank - 153,022 Standard Chartered Bank - Jumlah rekening Dolar AS 620,243 485,359 Total US Dollar accounts Jumlah deposito berjangka Total time deposits – pihak ketiga 650,391 485,359 – third parties Total cash and Jumlah kas dan setara kas 1,803,314 1,444,684 cash equivalents Tingkat bunga rata-rata per periode deposito berjangka diatas adalah sebagai berikut: The above time deposits earned interest at average period rates as follows: 2011 2010 Dolar AS 1.5 0.75-2.5 US Dollars Rupiah 7.25 - Rupiah Lampiran 530 Schedule CATATAN ATAS LAPORAN KEUANGAN INTERIM KONSOLIDASIAN ENAM BULANAN YANG BERAKHIR PADA TANGGAL 30 JUNI 2011 DAN 2010 Dinyatakan dalam jutaan Rupiah, kecuali dinyatakan secara khusus NOTES TO THE CONSOLIDATED INTERIM FINANCIAL STATEMENTS FOR THE SIX MONTHS ENDED 30 JUNE 2011 AND 2010 Expressed in million Indonesian Rupiah, unless otherwise stated 4. PIUTANG USAHA 4. TRADE RECEIVABLES 30 JuniJune 31 Desember 2011 December 2010 Tidak diaudit Diaudit Unaudited Audited Pihak ketiga: Third parties: Dolar AS US Dollars - TNB Fuel Service Sdn Bhd 222,961 - TNB Fuel Service Sdn Bhd - - Vitol Asia Pte, Ltd 96,584 59,730 Vitol Asia Pte, Ltd - - Noble Resources 93,023 - Noble Resources - - Taiwan Power Company 71,760 - Taiwan Power Company - - J. Aron Co 67,563 49,708 J. Aron Co - - Adani Global Pte. Ltd 63,479 - Adani Global Pte. Ltd - East India Energy, - - East India Energy Company, Pte. Ltd 47,232 - Company, Pte. Ltd - Coal and Oil Company L.L.C 30,040 20,592 Coal and Oil Company L.L.C - - Trafigura, Pte. Ltd. 216 32,593 Trafigura, Pte. Ltd. - - Mitsui Co. Ltd. 113 80,770 Mitsui Co. Ltd. - - Islands Group Limited - 74,176 Islands Group Limited - - J.P. Morgan Ventures Energy J.P. Morgan Ventures Energy - Corporation - 57,641 Corporation Korea East - - Korea East West Power, Co. Ltd. - 50,529 West Power, Co. Ltd. Phoenix Commodities. - - Phoenix Commodities Private, Ltd. - 30,041 Private, Ltd. - Lain-lain masing-masing dibawah Others each below - Rp 30.000 52,422 66,606 Rp 30,000 745,393 522,386 Dikurangi: Less: - Penyisihan piutang ragu-ragu 1,842 1,842 Allowance for doubtful accounts - Trade receivables - Piutang usaha - pihak ketiga 743,551 520,544 third parties Pihak yang memiliki hubungan istimewa: Related parties: Dolar AS US Dollars - Enel Trade S.p.A. 206,239 122,012 Enel Trade S.p.A. - - PT Kaltim Supacoal “KSC” 10,049 5,588 PT Kaltim Supacoal “KSC”. - Piutang usaha - pihak yang memiliki Trade receivables - hubungan istimewa, bersih 216,288 127,600 related parties, net Persentase piutang usaha - pihak yang Percentage of trade receivables - memiliki hubungan istimewa, bersih related parties, net terhadap jumlah aset 2.33 1.52 to total assets Analisis umur piutang usaha berdasarkan tanggal jatuh tempo adalah sebagai berikut: Aging analysis of trade receivables based on due date date is as follows: 30 JuniJune 31 Desember 2011 December 2010 Tidak diaudit Diaudit Unaudited Audited Lancar 923,171 598,306 Current Jatuh tempo 1 - 60 hari 10,112 17,274 Overdue 1 - 60 days Jatuh tempo 60 hari 26,556 32,564 Overdue 60 days 959,839 648,144