For years, 2557 (2014) service costs are in the ratio 72.70 per cent when compared with the revenue from services, which is the ratio of close to a year ago, with its constant costs include. Salaries and employee benefits best practices around 31 per cent increase compared to the year before. Due to expanding manpower and to comply with the overall economic conditions. A portion of the cost of depreciation machinery and equipment. Vehicles to transport increased by approximately 65 per cent compared with the year before. Due to the expanded service capacity to contain the buys, tools, equipment, vehicles, to accommodate growth. Best variable and the variable costs are 63 percent compared to revenue from services decreased from the past year with 66 percent compared to revenue from services.
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