The following list is an overview of this document. Within each section may be sub-sections, and within each sub-section may be other sub-sections, and so on.
If you have any questions, feel free to call me at (123) 555-0911 or send me e-mail at xxx@yyy.zzz.
I'll be very happy to consult you on anything you need help with (for example, chosing an appropriate PC system, good third party software, etc.).
Thank you and I hope this proposal comes very close to suiting your needs!
-Bill Kendrick