Math Formula Needed (Gautier, MS)

Name: Math Formula Needed (Gautier, MS)
Brand: Math Formula Needed (Gautier, MS)
SKU: genClassifieds-696134
Availability: InStock
Rating: 4.6 (20 reviews)

I need a formula to calculate mortgage pay off balances. I need this formula to calculate payoff balances when additional principal is added to the mortgage payments. The additional principal varies each month. I cannot find an online mortgage calculator to do this effectively.
I either need someone to give me a formula, or I need a website address with a mortgage calculator that will handle this.
For example:
On a $50,000 mortgage, the interest rate is 13.9% for 25 years. The monthly payment is $598.06. Each month the person pays the monthly payment of $598.06 plus some additional principal in random amounts ranging from $10-$150. These random additional principal payments go on every month for 5 years and the person calls and wants a payoff balance. How do I calculate an exact payoff balance?
As you know, every time a person pays additional principal, it changes the amortization schedule.
I can't find an online mortgage calculator or amortization calculator to do this. Bankrate is pretty good, but still not good enough.
I will pay for an answer, paypal or check.
I will pay $75 for this.

Location: Mississippi -

Added on 16 days ago and expires on 16 May, Ad id: 696134

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