There are four variables involved in amortization tables:
This program allows you to specify any of the three and calculate the fourth. The lower section allows you to see the remaining principle (balance unpaid on the loan) after a specified number of payments. 

New for V2.0, I've added what I call a "Uniform DrawDown Calculator". This assumes you start with an initial balance in an interest bearing account. If you withdraw a fixed ammount each month, this calculator will tell you how long the balance in the account will last. It will also tell you the remaining balance after any number of months.  
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