respectively, equivalent to 76.0% and 84.7% of total cost of sale respectively. An increasing in cost-of-sale was derived from the rise of average steel-coil price, which the average steel-coil price is in the
expenses of the 3rd quarter and 9 months of the year 2018 comparing to the last year, the significant change of expenses came from the increasing of cost of distribution, administrative expenses and
construction in 2019. In Q3/2018 RDF business has sold its product to customer and the company is adjusting the product to suit customer uses. However, the RDF plant is increasing its production and sales slowly
increasing of wage, welfare for employees etc. 4.3 Other expenses 4.3.1 In Q3/2019, the doubtful account reverse of allowance of Doubtful account at Baht 0.86 million, decreased Baht 2.06 million, decreased
cooling efficiency of air conditioners system by increasing air flow rate and saving energy (263,498 baht/year) 3. Reduce maintenance cost (342,050 baht/year) 4. KYE has consider air conditioner
last year’s which was lower than sales increasing rate reflecting from the upward gross profit margin of Q1/2020. The gross profit in Q1/2020 was increased from Baht 70.8 million to be Baht 79.3 million
. However, MCDC could not either provide additional land area and accept for increasing of wastewater tariff. In case that HSMC need to continue this project with the same condition in the contract, the
investments in addition to dropped investment in associated companies and other non-current financial assets. Total liabilities amounted to Baht 54,891.29 million, increasing by Baht 118.22 million from the end