Audit Firm Name: Subject : Monitoring Prepared by Date Particulars Reference /Guidance Notes Description A Monitoring the Firm’s Quality Control Policies and Procedures 1 Does the whole firm perform

Audit Firm Name: Subject : Human Resources Prepared by Date Particulars Reference /Guidance Notes Description A Human Resources Planning 1 Is the firm’s human resource planning in line with the

Audit Firm Name: Subject: DOCUMENTATION Prepared By: …………. Date: ……………….. Documentation Sr. Particulars Reference / Sr. Particulars Reference / Guidance Notes Description 1 How does the firm document

equity (times) 0.5 0.3 The Company’s gross profit margin in Q1’20 reported at 35.4% (+60 bps YoY), driven by Fit Fast Firm project (cost saving project). However, due to the phasing of advertising

1 / 4 No.IR.002/2018 22 February 2018 Re: Notification of the changes of the Profit and Loss Statement To: President Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited

Questionnaire A Monitoring the Firm’s Quality Management Policies and Procedures Firm's Reference /Guidance Notes Description A1 Does the whole firm perform inspection to evaluate its compliance with

UNOFFICIAL TRANSLATION PAGE 12 Certification and Consensus of Audit Firm Date ........ Month ....................... Year ............... Dear Secretary-General of the Office of the Securities and

UNOFFICIAL TRANSLATION Certification and Consensus of Audit Firm Date ........ Month ....................... Year ............... Dear Secretary-General of the Office of the Securities and Exchange

Form 61-2F Certification and consensus of audit firm Date ........ Month .......................... Year ............... Dear Secretary General of the Securities and Exchange Commission of Thailand

Osotspa Public Company Limited Q1’19 Management Discussion & Analysis 14 May 2019 Q1’19 Management Discussion & Analysis Page 1/6 Financial Highlights - Q1’19 Net profit* was at THB 888 million