The service costs for the year-2555 (2012) of 6.61 million. 1.82 percent of the total revenue of the year there are 2556 (2013) 14.07 million. 2.86 percent of the 2557 (2014) annual income and number of 17.76 million. 3.24 percent of the total revenue, which is free of charge on the marketing campaign, and expenses related to attending events, which varies according to the amount of income. Significantly increased สาะ margin settings are bad debts caused by a public authority to a service.
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