992 million and THB 887 million, respectively, increased by THB 234 million or 25.8% mainly due to higher orders. 4. Property, plant and equipment Property, plant and equipment as of December 31, 2019

-term investment) 3.82 0.20% 3.46 0.16% Property, plant and equipment 577.77 30.47% 581.77 27.46% Intangible assets 2.28 0.12% 1.74 0.08% Deferred tax assets 18.94 1.00% 16.90 0.80% Other non-current

and service for the year ended 31 December 2021 and 2020 are presented below: Q1-2021 Q2-2021 Q3-2021 Q4-2021 2020 2021 THB Mn THB Mn THB Mn THB Mn THB Mn % THB Mn THB Mn THB Mn % Fuel materials cost

%YoY Fuel materials cost 583.3 808.1 811.4 0.4% 39.1% 1,119.8 1,619.5 44.6% Depreciation and amortisation cost 155.4 165.8 169.1 2.0% 8.8% 307.9 334.9 8.8% Staff cost, repair and maintenance cost and

Mn THB Mn THB Mn %QoQ %YoY THB Mn THB Mn %YoY Fuel materials cost 643.3 811.4 987.0 21.6% 53.4% 1,763.1 2,606.5 47.8% Depreciation and amortisation cost 154.0 169.1 169.3 0.1% 9.9% 461.9 504.2 9.2

of sales and service THB Mn THB Mn THB Mn THB Mn THB Mn % THB Mn THB Mn THB Mn % Fuel materials cost 808.1 811.4 987.0 1,001.8 14.8 1.5% 2,485.6 3,608.3 1,122.7 45.2% Depreciation and amortisation cost

and 2022 are presented below: Cost of sales and service Q3-2022 Q2-2023 Q3-2023 Change 9M-2022 9M-2023 Change THB Mn THB Mn THB Mn %QoQ %YoY THB Mn THB Mn %YoY Fuel materials cost 987.0 808.3 777.3 (3.8

-2023 Q4-2023 Change QoQ 2022 2023 Change YoY THB Mn THB Mn THB Mn THB Mn THB Mn % THB Mn THB Mn THB Mn % Fuel materials cost 905.5 808.3 777.3 779.5 2.2 0.3% 3,608.3 3,270.6 (337.7) (9.4%) Depreciation

Baht 110.9 million. Cost of sales and service Quarter 2 Quarter 1 Quarter 2 Change 6-month 6-month Change (Unit: THB Mn) 2023 2024 2024 %QoQ %YoY 2023 2024 %YoY Fuel materials cost 808.3 716.5 754.0 5.2

2024 %YoY Fuel materials cost 777.3 754.0 850.8 12.8% 9.5% 2,491.1 2,321.3 (6.8%) Depreciation and amortization cost 180.0 195.6 204.8 4.7% 13.8% 531.4 581.9 9.5% Staff cost, repair and maintenance and