Dear Employer,
I suppose I could handle your project well in appropriate time. This work needs some skills and experiences, which I have accumulated for many years.
To do this job I might write some codes for R or formulas for Excel and I can manage this easily. I hope to do this work in 2 or 3 days but I need to know more details about your project to estimate my working time.
I have a great tutor experience in Mathematics, Physics and Computer Science will help us to communicate each other. I’m ready to answer any questions concerning the work.
We'll state my task together I hope.
If you even will not choose me for that project, I’d like to be useful for you in future projects.