English-French customer service email translation -- 2

I have a collection of social networking websites. Some of these have french language users. As such a need someone to translate customer services email to/from french. The process is very simple.. 1) i will receive an email from the client, i forward it to you, 2) you reply with the translation, 3) i write a responce and send back to you again for translation to french, 4) you reply with the translation. As such, each email from a client will usual result in 2 translations from you. Sometimes the langauge is easy enough for me to use google translate for part of this process and sometimes the issue will be easy enough to use a pro forma reply, so some emails will require just one translation. I have several translators for various languages and pay a standard of $0.30 for each translation. The average length of the emails is about 20 words. You should be able to typically reply within 24 hours. The quantity is an average of 20 a week. The min and max budget i have set is simply to fullfull the stadardised requirements. The project is ongoing. This project is open to native French speakers only.