565303 Calculator Scripts

I need three calculators scripts written, preferably in php or javascript, and then some assistance integrating them into my current website pages. I have links to other sites that have these calculators so that the logic/calculation formulas can be obtained. These are the example calculators I want: [login to view URL] [login to view URL] [login to view URL] Time is of the essence on this project. Please do not bid unless you are prepared to immediately begin work upon selection. Payment is 30% upon starting, 70% upon successful integration and testing is complete on our site.