I would like a calculator that it would tell customers when their mortgage will be paid based on their current minimum payment. Also, it will tell them each dollar based on todays date will save them $$ in the long run, it will also tell them how much they will pay in intrest for the rest of the term.
based on my understanding you will need
1. Amount of payments or 1st payment start day
2. Interest rate
3. Original Balance
4. Current Balance
I think that all you would need to figure out the answer.