income 5 84 -79 -93.78% Cost of sales and services 4,258 3,744 514 13.72% SG&A expenses 341 197 144 73.37% Interest and Tax expenses 89 66 23 34.53% Share of profit from associates and JV 68 39 29 75.16

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

(311.70) (258.46) 53.24 20.60 Gross profit 33.17 17.48 15.69 89.76 Other income 0.75 0.90 (0.15) (16.67) Profit before expense 33.92 18.38 15.54 84.55 Administrative expenses (16.76) (15.49) 1.27 8.20

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

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

- 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