The monetary unit is the Omani Rial (RO or OR or OMR). It is divided into 1,000 Baiza (baisas). Omani Rial is tied to US dollar at a midrate approximately USD 1 = RO 0.384. Main shops, hotels and restaurants in Muscat and Salalah accept major credit cards (Visa, MasterCard, American Express, Diners Club). ATMs can be found in various locations in Oman. But in the interior or smaller shops and souqs accept only cash payment.