The user can edit the calculation after opening the calculation from Calculation History by using the Edit Calculation at the bottom Calculation detail.
The system opens the calculation with the original values, but without calculating the combinations. The user can change the entered parameters and confirm Calculation of combinations. The system for calculating the instalment searches for the current REFI rate and receives the current residual value and service costs from api_prices, or entered manually if it is authorized to do so.
If the user changes the selected vehicle, the system cancels the other stored parameters and it is necessary to enter everything as when creating a new calculation.