I need someone to build a calculator that will allow customers to estimate the cost of floor coverings. they need to be able to measure rooms, enter the dimensions one room at a time (no need to track the rooms, just keep a running total in sq ft), and track the total square footage, then be able to multiply the sq footage by the cost per square foot, and save the result as a text file. I need a windows program, and later an android app for the app store. This bid is for the windows program, no backward compatibility beyond WIN7 required. I do want to be able to skin it with a background image for branding purposes. Looking for something simple and cheap. How much?