Hello!
The task you are asked to do is simple but painstaking because it requires time to assemble the database, tests, and provide you with the final product in an Excel spreadsheet. In addition, it is necessary that you send the database for registration and that later it will be maintained by you. To be honest, as I said, it's a simple job but it requires a good effort to keep it and quality. This way I send you a realistic budget, within what you are being asked to execute.