729.9% Cost of sales and services (819.3) (796.3) (822.9) 3.3% 0.4% (2,506.5) (2,407.9) (3.9%) Cost of construction under a concession arrangement (21.2) (398.1) (215.0) (46.0%) 914.2% (89.7) (744.4

expansion of their Non-oil businesses, however the cost of selling, general and administrative expense remains high, leaving the Bangchak Retail Co., Ltd.’s EBITDA still in the negative, therefore effectively

purchase agreement 102.8 99.2 101.6 2.4% (1.2%) 203.7 200.8 (1.4%) Revenue from construction under a concession arrangement 398.1 - - - N.A. (

.(

- - - - - - 870.5 - (870.5) N.A.(

....................................................................................................................................... 7 Solar energy .................................................................................................................................................... 8 Other income and fixed cost

closed from nationwide restriction. SIM & Device margin was marginally negative at -0.5%, down from +2.7% in 2Q21 due to decline in high margin devices sale. Cost & Expense Cost of service in 3Q21 was

%, compared to +1.2% in 4Q20 due to decline in high margin devices sale from seasonality. Cost & Expense Cost of service for 1Q21 was Bt21,126mn, increasing 3.9%YoY and 3.4%QoQ from network OPEX following 5G/4G

due to 1) sales decrease; 2) higher cost per unit as a result of lower utilization rate; 3) higher depreciation; 4) higher excise tax and sugar tax following the Excise Act, B.E. 2560; 5) sales

/Litre, lowered by 5% YoY, a result from lubricant product’s rising cost compared to their stagnant price, combined with slight dips in retail marketing margin. Marketing margin decreased 1% QoQ, from