Simple web calculators are typical examples of the first version of the calculator as described in our development process. These calculators are based on the provided excel calculation model and contain only the desired input and the output of the model. The do not include graphical control elements (e.g sliders, check boxes etc.) and charts, but they are cost effective and can be delivered in extremely short time (usually within 1-2 days). It is the perfect solution for small enterprises and individuals.