Per Entry we should be able to add related PDF / documents and Jpg files with each sales invoice and while mailing clients our invoice we should be able to attach them. i.e. when doing some projects, sending an invoice only is not a requirements, but they are also asking for challan signed copy, AWB copy or when it was delivered etc etc, getting those details from the physical files becomes hectic and time consuming job. This will help to send all the data to client via mail on a single click.