completed. 4 Cost of sales and service Cost of sales and service for the period ended 30 September 2020 and 2019 are presented below: Q3-2019 Q2-2020 Q3-2020 9M-2019 9M-2020 Change THB Mn THB Mn THB Mn %QoQ

also decrease in line with the fuel material cost of natural gas. Q2-2020 Q1-2021 Q2-2021 6M-2020 6M-2021 Change THB Mn THB Mn THB Mn %QoQ %YoY THB Mn THB Mn %YoY Revenue from construction under a

30 September 2021 and 2020 are presented below: Q3-2020 Q2-2021 Q3-2021 9M-2020 9M-2021 Change THB Mn THB Mn THB Mn %QoQ %YoY THB Mn THB Mn %YoY Fuel materials cost 515.9 583.3 643.3 10.3% 24.7

7.8 13.9% Other cost 25.5 26.1 22.2 19.6 (2.6) (11.7%) 78.4 93.4 15.0 19.1% Total cost of sales and service 874.7 920.4 971.2 1,041.7 70.5 7.3% 3,196.3 3,808.0 611.7 19.1% Change QoQ Cost of sales and

service Cost of sales and service for the period ended 30 June 2020 and 2019 are presented below: Q2-2019 Q1-2020 Q2-2020 6M-2019 6M-2020 Change THB Mn THB Mn THB Mn %QoQ %YoY THB Mn THB Mn %YoY Fuel

Company Limited and its subsidiaries had the operation results for the year ended December 31, 2019 with the following details: unit: THB million 2019 2018 Change (THB mill.) Change (%) Revenue from Sales

Limited and its subsidiaries had the operation results for the six-month period ended June 30, 2019 with the following details: unit: THB million 2019 2018 Change (THB million) Change (%) Revenue from Sales

Public Company Limited and its subsidiaries had the operation results for the 3-month period ended 31 March 2020 with the following details: unit: THB million 2020 2019 Change (THB mill.) Change

: Million Baht Revenue from sales of goods 2,382.38 2,358.64 23.74 1.01% Revenue from service 1.29 1.87 -0.59 -31.32% Total revenue 2,383.66 2,360.51 23.16 0.98% Cost of goods sold 1,651.27 1,582.74 68.54

the Q2 of the previous fiscal year or 5.39%. The cost increased more than the increasing of sales as a result of upwardly adjust in raw material price and soften economic of scale of the plastic