84 Consolidated  Notes to the  Financial  Statements Note 4 – Segment information (continued) Geographical information Information about major customers The consolidated entity operates in one principal geographical area – Australia.  The total of non-current assets other than derivative financial instruments and deferred tax assets located in Australia is $9,563.0 million  (2011: $6,910.5 million), and the total of non-current assets located in other countries is $2.6 million (2011: $3.1 million). The total external revenue is all from customers located in Australia for both 2012 and 2011. No single customer amounts to 10% or more of the consolidated entity’s total external revenue for both 2012 and 2011. 2012  $m 2011  $m Note 5 – Revenue Revenue from sale of goods 7,288.9  6,898.7  Revenue from rendering of services 165.1  173.1  Other revenue Royalties 1.6  0.7  7,455.6  7,072.5  Note 6 – Other income Gain on purchase of financial instruments 2.9  –  2.9  –  Note 7 – Expenses Cost of sales 5,918.4  5,706.4  Loss/(gain) in fair value of electricity derivatives – economic hedges 304.6  (218.8) 6,223.0  5,487.6  Administrative expenses 165.0  148.9  Employee benefits expense 356.4  330.6  Other expenses Impairment loss on trade receivables (net of bad debts recovered) 55.7  51.0  Impairment loss on exploration and evaluation assets 35.8  –  Impairment loss on available-for-sale equity investment –  0.2  Loss on remeasurement to fair value of pre-existing equity interest in an acquired entity (Note 43) 120.7  –  Cumulative loss reclassified from equity of pre-existing equity interest in an acquired entity (Note 43) 36.3  –  Merger and acquisition related costs 12.9  17.3  Redundancy, termination, integration and restructure costs 8.9  27.0  Net loss on disposal of exploration and evaluation assets 1.1  –  Net loss on disposal of oil and gas assets 0.1  –  Net loss on disposal of property, plant and equipment 0.3  3.5  Operating lease rental expenses 20.4  20.9  Other 63.4  52.0  7,100.0  6,139.0 