loop question

Hi

I have a form that does many calculations, I’m tryind to add a section that will product an amortization schedual between to payments’

say between payment 100 and 125

The information that I want the loop to return is

Payment number payment(p) interest(i) Principle Balance(b)
(last Balance)
1 200.00 (b(last)*i/365*pFreq) (p-i) b-(p)
2
3
any thoughts or a place I can go to figure this out

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