This is a simple VAT calculator. It is possible to add or remove VAT value from a price. The value of VAT is set by the user, a very useful way to have a powerful VAT calculator. If we consider VAT as a percentage, then this calculator is also a percent cal.
PRO: - easy to use (only two interface, one for calc and another for setting) - change of VAT value - add or remove VAT value from a price