Owner statement: Fixed monthly price for Long-Term Reservations

For long-term reservations with a fixed monthly price, the owner statement doesn't reflect the fixed price. it calculates the total amount based on the number of days in each month rather than showing the exact agreed monthly payment.
For example, if a reservation is set at 100K per month for a year (1,200,000 total), January might show 101,918 instead of 100K due to the calculation method.

For now I need to create a separate reservation for each month, which is inefficient.
A fix for this would greatly improve clarity and reduce manual adjustments.