% Administrative expenses 35.24 19.75 15.49 78.43% Foreign Exchange loss 6.57 - 6.57 100.00% Finance cost 2.90 0.53 2.37 447.17% Profit before income tax expenses 18.48 113.42 (94.94) -83.71% Income tax expenses
57.43 52.08 90.68% Selling expenses 51.70 5.99 45.71 763.11% Administrative expenses 40.65 18.80 21.85 116.22% Foreign Exchange loss 1.07 - 1.07 100.00% Finance cost 1.94 2.13 (0.19) (8.92)% Profit before
along with cost control and foreign exchange rates including more attend in the international events. The company's policy in 2018 is to maintain its customer base and domestic sales both of the
potential to operate along with cost control and foreign exchange rates including more attend in the international events. The market in China reduced considerably due to the growth of saturated, the price
change in foreign currency rates Table 1: Foreign currency exchange rates and sales in foreign currency 2) a higher cost of main raw materials The effect from copper usage was about 2.7% on product sales
amounting to THB 1.9 million due to the fact that in 2018 Company had gain from exchange rate and advertising revenue. Cost of sales or service and Gross profit Unit : THB million For the year ended 2019 2018
efficiency work process for the Group to get a qualification of listed company in the Stock Exchange in Thailand. Financial cost Financial cost was interest expense for long-term long from a commercial bank on
wastewater treatment as the 30-year right exchange of service cost collection from the entrepreneurs in the industrial zone of the another subsidiary since the return received in the future is not worth the
gross profit margin narrowing to 20% from 26% the previous year. The decrease was due mainly to the impact of a higher cost of goods sold and a change in foreign currency exchange rates. The cost of goods