Other financial discussions

Hello Caryl,
I just read your post on how you paid off your 30 yrs mortgage on 15 yrs. I couldn't help, but wonder how. Then after I read to the end I found the answer. It really caught my attention. That is because I have a car loan. So I was wondering if you could email the excel link or sheet that you used to calculate interest and principal ... so tht I can plug in numbers and see how quick i pay off my debt if I start paying more than the minimum.
My email is [email address removed]
Thank you..