Thank you for your invitation,
We are very interested in working on this project, but it would be great if we can connect on Skype or phone as per your comfort for further discussion on the scope of work.
Look forward talking to you soon.

could you add a picture of the fake 20 dollar bill you have in mind?

Oh, I'm sorry, but I don't have one, apart from the picture that is in my head. The main thing is that George Washington's face is on a dollar bill. Whoever did the counterfeit bill had to use a good photocopy of the corners on a $20 bill.