I have looking for a plugin that does exactly what Calculated Fields Form does.
It is perfect and complete. It saves me a lot of time and allows me to developed complex calculations. I am developing a page with a product configurator that calculates the price of a product based on a lot of parameters. Besides of the calculation, I can show the variable image of the product depending of the selected features.
And the support is excellent! The technicians answer even during the weekend and never late that a few hours.
Thanks a lot to the developers, and specially to Karen.