Hi,
After working as a translator in a large video game company (publisher of Skyrim) for 3.5 years, I am taking a break for a while, and have a lot of time on my hands, meaning I'm available to work on your project right now.
The rates I use are $0.09 per word until 1000 words, then $0.08 per word over that threshold. For this project it would amount to $20 including Freelancer fee.
The way I would usually work would be by starting with a quick read through of the email, to get a sense of the tone and context, which I usually find to be as important as correct grammar and spelling. Then I would perform the actual translation, making sure your text matches both the appropriate tone and context, and is of course in proper English.
If you have any questions, I'd be happy to answer them.
Have a good day,
Arthur