How much do agents charge for document translation and attestation at the MFA in Thailand?

An individual is seeking information about the fees charged by agents for translating and attesting documents at the Ministry of Foreign Affairs (MFA) in Thailand. A comment suggests visiting a translation shop located on the 2nd floor of the MFA near Cheng Wattana MRT station, where one can get documents translated and then attested by the MFA, with the option to have documents sent back via EMS for an additional fee.