Hello,
Although I don't have experience on freelancer.com yet, I have done a few jobs in Amazon Mechanical Turk that have involved transcribing documents from image files to text.
My typing speed is ~70 WPM. I am very good at proofreading my work as I type, and always check my work when I am finished.
If hired, I will try my best to complete this job as quickly and accurately as possible.