I specialize in building custom apps/programs to automate routine tasks. My preferred language is python and I have a good working knowledge of most common languages and techniques.
For reference, I have built a windows program that does GST Tax liability calculations based on reading inputs in excel and built in logic chains. The application interface is GUI and easy to learn. You can view the program in my profile. Additionally i have 4+ years of experience in developing ERP programs and reports
I can build for you a modern GUI based application that accepts inputs from flexible sources, uses lookfile for customer information,calculates based on logic provided, saves the data in a database for reference and prints job costing in PDF
If you could provide me with a more detailed explanation of the requirement, i would be happy to provide a walk through on how the program would be structured. Please let me know if you require any clarifications. Thanks