Investor Presentaiton

Cost Structure BUMA's Cost Structure for 9M 2013 (9M 2012) Non-fuel Costs Some contracts contain pre- determined cost escalation payments One off payments under extraordinary circumstances D&A 20% (23%) Salary 17% (14%) Overhead 5% (5%) Others 7% (7%) Note: Other consumable: tires, blasting, drilling and oil Salary includes labor supply Others: mobilization, rental, subcontractor and travelling expenses Source: BUMA Company Data Other consumable 13% (13%) Fuel 12% (15%) Spare parts & FMC 27% (23%) Delta Dunia Fuel Costs All contracts have a cost pass through mechanism for fuel Around 70% of customers are now securing their own fuel. Positive for working capital 14

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