Here’s the table:

enter image description here

I think the payment period is a month, but I don’t understand why it’s 100.

The image is taken from this Excel exercise: http://web.utk.edu/~dhouston/excel/exer3.pdf

  • did you follow the steps in the exercise? – mhoran_psprep Sep 28 '18 at 9:55

It is the 100th month of the mortgage term.

Using the PMT() function in Excel I generated this amortization schedule with the variables in your question:

Amortization Table

For some reason rather than showing the whole amortization table they chose to let you calculate for any given month what the split between principal and interest would be.

Edit: Added the formula text in the next cell over on the top portion to show interest percentage used and PMT() function format.

  • Your table is definitive. – user67265 Sep 28 '18 at 3:34
  • Incidentally, when the Payment Period is 100 the Principal Paid is =(1+B5)^(100-1)*(B6-B5*B3) and the Interest Paid is =B6-(1+B5)^(100-1)*(B6-B5*B3) – Chris Degnen Sep 28 '18 at 8:44

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