35.1% Cost of Service 672.4 36.0% 875.4 34.7% 203.0 30.2% Gross Profit 1,086.3 58.1% 1,413.0 56.0% 326.7 30.1% Other Income 6.4 0.30% 11.8 0.5% 5.4 84.4% Administrative Expenses 302.8 16.2% 394.1 15.6

expenses increased slightly by only 0.15% from Baht 389.26 million in Q1 2020 to Baht 389.86 million in Q1 2021. Core operating profit (defined as Earnings before Interests and Taxes exclude interest income

ended 31 December 2018, which net profit has changed more than 20% from the last year as follows: Statement of Comprehensive Income Unit: Million Baht 31 December 2018 31 December 2017 Increased

June 2020, which net profit has changed more than 20% from the last year as follows: Statement of Comprehensive Income Unit: Million Baht 30 June 2020 30 June 2019 Increased (Decreased) Percentage Remark

ended 30 September 2019, which net profit has changed more than 20% from the last year as follows: Statement of Comprehensive Income Unit: Million Baht 30 September 2019 30 September 2018 Increased

- Testing and Inspection 13.89 13.12 0.77 5.87% 3 Cost of sales and services (442.04) (406.41) 35.63 8.77% Gross Profit 43.73 30.54 13.19 43.21% Other income 3.89 3.28 0.61 18.51% 4 Profit before expenses

%) Gross Profit 192.41 39.9% 237.71 45.4% 45.30 23.5% SG&A 82.75 17.2% 97.39 18.6% 14.64 17.7% EBITDA 155.43 32.2% 186.69 35.7% 31.26 20.1% EBIT 109.66 22.7% 140.33 26.8% 30.67 28.0% Interest Expenses (0.80

ended 30 September 2018, which net profit has changed more than 20% from the last year as follows: Statement of Comprehensive Income Unit: Million Baht 30 September 2018 30 September 2017 Increased

202.23 93.00 (172.12) (45.98) Other income/1 12.31 3.18 15.23 7.00 2.92 23.72 Total revenue 386.66 100.00 217.46 100.00 (169.20) (43.76) Notes: /1 Other income comprises mainly of interest income and

38.99 35.09 (3.90) -10.00% Income tax 31.97 37.04 5.07 15.86% Net profit 82.54 139.02 56.48 68.43% Net profit Ratio (ROS) 15.36% 19.92% Earnings per share (Baht) 0.21 0.26 0.05 22.59% Total Revenue For