The currency of Slovenia is Euro or EUR since January, 1st, 2007. One can get it in a Bank or at the ATM’s – they are everywhere and easily accessible. Possible Means of Payment International credit cards are widely accepted: Maestro, MasterCard, Visa, Diners, American Express.
Food and beverage prices are lower than in most neighbour countries like Italy or Austria. Grocery shopping should also cost you less than in most EU countries. Eating out in restaurants depends on the price range of particular restaurant. You can find low budget, fast food places, but also upscale and fancy restaurants with higher menu prices.
If you wish to go shopping for clothes you might consider visiting Outlet shopping centres. In most regular shopping centres the prices are comparable to other EU countries. Whereas, in outlet stores you can really run into some awesomely good deals. While visiting Koper, few famous outlet centres are located in near Italy.