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
natural gas power plant decreased by Baht 70.1 million from decrease in unit rate which is adjusted in line with the decrease in average natural gas price, thus sales also decrease in line with the fuel
reduced Market GRM, following the decline in refinery production volume due to the TAM, as well as a decrease in average Gasoline/Dubai crack spread and Fuel oil/Dubai crack spread, and the rise in crude
sales and service Cost of sales and service for the period ended 31 March 2020 and 2019 are presented below: Q1-2020 Q1-2019 THB Mn THB Mn THB Mn % Fuel materials cost 210.0 215.9 (5.9) (2.7) Depreciation
decrease in unit rate which is adjusted in line with the decrease in average natural gas price, thus sales also decrease in line with the fuel material cost of natural gas. Sales and service income (included
revenue: average prices have resumed an upward trend having fluctuated somewhat over the quarter due to product mix impact. This upward trend is set to continue as input prices such as fuel rise. Saraburi
costs as our fuel expenses have increased in recent months in line with the general trends on the solid fuel market. The operational efficiency improvement projects will along with fixed cost discipline
31 March 2023 and 2022 are presented below: Q1-2022 Q1-2023 Cost of sales and service THB Mn THB Mn THB Mn % Fuel materials cost 808.1 905.5 97.4 12.1% Depreciation and amortisation cost 165.8 173.4
also decrease in line with the fuel material cost of natural gas. In addition, sales of biomass power plants which decreased by Baht 68.5 million as the biomass power plants had shutdown hours to improve