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.
- 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