Can you help me write an email using the following information
I am Fern from Shin-Ei consulting.As per the conversation that we had on the phone.I have some questions about the Designation Letter for the development office.Do we need to put  salary wage in the letter to make it complete in Thai legal or it 's unnecessary?What is a must put information we need to put into the Designation Letter?I will be appreciate if you can give us a service rates information of writing some 1 - 2 pages agreement or business letter like this