The amortization screen produces a payment schedule and solves for any one of the four variables (amount of loan, number of months, interest rate or monthly payment amount) if the other three variables are known:

Amount of Loan - The principal amount of the loan.

Number of Months - Duration in months over which the loan is amortized.

Annual Interest Rate - The percentage rate on the loan.

Monthly Payment - How much is due each month when the loan is amortized.