Businesses in tourist destinations, including restaurants, bars, department stores, souvenir shops, and supermarkets tend to accept dollars, though you will receive a less favorable rate than at the banks. That said, most prices in the Dominican Republic are in Dominican pesos. If you plan to make a big purchase in small shops and markets, negotiate first with the seller who may be interested in receiving the payment in American dollars or euros. Prices are fixed, however, in supermarkets and shopping mall stores. Your best bet is to use an ATM to withdraw local currency at the best daily exchange rate.