Web Application read requirement properly

I have a desktop application for masters management and Web application for generating Reports and would like a web application combination of both with additional transactions pages. I can provide the setup for the desktop app and all design for master and trnsactions. database is ready. I need this done in the shortest time possible 15-20 days. bidder will not allow to increase bid. No advance payment, payment completion of stage wise total 4 stage developer from lucknow uttar pardesh will be preferred