Notes to the Financial Statements 77 Notes t o the Financial Statements continued Operations Development Exploration Corporate Total Group 2013 Chatree  $’000 Challenger  $’000 Bowdens  $’000 Nueva  Esperanza  $’000 $’000 $’000 $’000 External sales revenue 226,759 102,523 – – – – 329,282 Other revenue 166 513 – – 51 – 730 Total segment revenue 226,925 103,036 – – 51 – 330,012 Segment EBITDA 93,593 16,656 (234) (3,070) (298) (11,637) 95,010 Impairment – (311,850) – – (20,421) (537) (332,808) Depreciation and amortisation (26,962) (58,474) (18) (32) – (109) (85,595) Profit / (loss) before finance cost and income tax 66,631 (353,668) (252) (3,102) (20,719) (12,283) (323,393) Finance income 2,103 153 6 – 10 315 2,587 Finance costs (10,716) (141) (6) (1,258) – (6,688) (18,809) Net finance costs (8,613) 12 – (1,258) 10 (6,373) (16,222) Profit / (loss) before tax 58,018 (353,656) (252) (4,360) (20,709) (18,656) (339,615) Other segment information Segment assets 540,422 42,892 106,564 63,378 4,618 12,114 769,988 Segment liabilities (205,089) (29,077) (1,346) (5,734) (1,331) (53,451) (296,028) Segment intercompany assets / (liabilities) 46,588 (61,501) (21,909) (42,533) (14,775) 94,130 – 2012 External sales revenue 217,3 07 140,065 – – – – 357,372 Other revenue 281 819 – – 1,150 – 2,250 Total segment revenue 217,588 140,884 – – 1,150 – 359,622 Segment EBITDA 120,751 65,730 – (1,020) (519) (18,210) 166,732 Depreciation and amortisation (18,601) (48,723) – – – (229) (67,553) Profit / (loss) before finance cost and income tax 102,150 17,007 – (1,020) (519) (18,439) 99,179 Finance income 335 256 9 1 11 857 1,469 Finance costs (4,558) (141) (5) (3) – (4,664) (9,371) Net finance costs (4,223) 115 4 (2) 11 (3,807) (7,902) Profit / (loss) before tax 97,927 17,122 4 (1,022) (508) (22,246) 91,277 Other segment information Segment assets 493,647 379,434  87,974 50,481 28,555  8,368  1,048,459 Segment liabilities (131,314) (91,915) (926) ( 7,312) (882)  (40,297) (272,646) Segment intercompany assets / (liabilities) (57,295) (29,085) ( 7,6 01) (21,946) (11,806)  127,73 3 –