Field help (RMNTPA) 

This field displays the amount of capital to repay at the beginning of the period concerned by a leasing contract payment. It is expressed in the contract currency.
The balance to repay of the first payment is loaded by default with the capital amount of the leasing contract. It remains modifiable.
The balance to repay of the following payments equals the capital amount of the leasing contract minus the financial depreciation of the previous payments.