Calculation Sheet in VB/VB.net

Need a simple page layout written in VB/VB.net. The page will allow the user to input up to three values. There will be two outputs valves. We have created a working copy with layout, titles, and formulas written in microsoft excel which is attached. There needs to be a password protected page that will allow the user to change the formula constants. We show the formulas and constants which need to be changed on attached files. We need to run this program from a web page. Larger future projects are possible.