Financing simulator calculator: calculate based on the monthly payment

Users have the ability to input the monthly payment amount that the end consumer is willing to pay directly into the system. Once this figure is entered, the calculator automatically adjusts the number of months and the corresponding contributions required to meet that monthly payment. 

This is especially useful in situations where the end consumer already has a clear idea of the amount they can afford to pay each month, allowing for a more tailored and flexible financing plan that better suits their financial preferences and needs.