LOAN_PAY - Calculate loan payment Schedule
This function is useful for estimating payments for uniform payment schedules
for such items as car loans and house mortgages.
The schedules include the amount of remaining debt , the interest for the
Two rules are available:
- using the Capital Recovery Factor which pays the interest and some of the
debt with every period.
- The 'RULE of 78' that is used by some lending institutions to load the
interest repayments to the front end of the series and that causes the debt
to increase in the early part of the series.
End to date, ams 990712