With more than 200,00 copies sold, 'Monthly Interest Amortization Tables' is the preeminent guide to calculating loan payments of any kind. This handy, extensive manual allows you to quickly and simply determine: Payments on loans of $50. to $300,00 at interest rates of 2% to 27.75% for up to 40 years.. Monthly, quarterly, semiannual, and annual payment tables for a $1,000 loan.. Remaining balance tables showing what percentage of a loan remains unpaid at any given time. Proration tables based on both a 360-day and a 365-day year.