Dear,
I check the project Details, and Download the attached PDF file,but i unfortunately can access Flowchart due to link broken,i divide the project into Milestones to be organized, i can complete this task using Python and Pyqt5 and some useful functionality to reports, i created a complete CRM and ERP Web Based Application.
i will asking you to send a sample from Excel file to get all details helping me to finish the project correctly.
feel free to contact me to send a example of my completed Desktop Application, and you can access it from my GitHub Account or i can send the user name and password for the demo version from finished ERP.