hey guys I’m going to create a tourism agency management system. the customers can ask for changes to the programs that they get from the agency so the total amount can be changed and all the tour, rent car, hotel prices ( all this has different tables and has its own price all of These prices are summed up and the sum saved in financial_transaction table ) so what the data that have to be saved in financial_transaction and what the best way to handle and display all of these changes