Dear Sir,
I understand that this is simple data entry job, although time-consuming. I don't know how much material do you have and that is why I cannot tell you how long it will take to do this job, but I can assure you that I will give my best to do this job properly, correctly and within the given time frame.
Although I am new here, I have great English skills and very good at MS Office, so you can count on the work to be done.
Ofcourse, if you have any questions, you can contact me via freelancer.
Hope hearing from you.
Kind regards,
Shmrle