Virtuemart configuration of currency, tax....

We have joomla 3 / virtuemart 3 website and we need a person who can make 4 next simple configuration: 1. On site the currency is showing as Euro € and should be croatian kuna KN. 2. The same issue is in administrator of vm when we add the price its € and should be kn 3. The tax is not calculating the final price. The tax is + 25% of each price. For example if the base price is 500,00 kn then the final price with tax should be 625,00 kn (500,00 kn X tax 25% = tax = 125,00 kn + price = 625,00 kn is final price) 4. The hrkuna should be different written price: 125,00 kn and 1.250,00 kn Total price $5