As for the negative balance of baht 2,805,821, the amount was an audit adjustment of service revenues in FY2012, which was subsequently reversed in 2013 to adjust retained earnings in GL per audit to be equaled to GL per corporate.
Generally, the revenue from the cost plus mark-up basis is based on the incurred operating expenses which will normally be adjusted by auditor at the end of the year, which results in the adjustment of service revenue.