A calculator form which allows the total area of a series rectangles to be added and removed in order to calculate the total size. The calculator should be a single page which appears to be very simple allow the calculation of the area of a rectangle and then grows additional fields in responds to an 'add an area', 'subtract an area' control. Later in a separately commissioned phase will add the ability to e-mail the results.
The area calculation should support calculation of a two sided area measured in feet, inches and common fractions of an inch down to 1/2,1/4,1/8,1/16. Subsequent areas can then be added and removed. The number of areas involved can be limited to 5 additions and 5 subtractions or 10 of either or not be limited.
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