Please accept my bid for your task for the following reasons -
a) I understand your requirements for the job.
b) I have several years experience working as an administrative professional and will provide excellent, error-free typing and data entry.
c) I achieved very high scores in the numeracy test on this website. Please feel free to check this out.
d) Fast, accurate typing and a native understanding of the English language will ensure that you receive only the best level of service.
e) Please contact me directly with any inquiries as to the suitability of my skills for the advertised task.