According to the Serbian statistical office, the Retail Prices Index (RPI) inflation reached 9.4% in 9M09. Retail prices increase by 0.3% in September 2009. Prices of agricultural products recorded a 0.7% increase on the back of the seasonality of fruit and vegetable prices. Prices of industrial products rose 0.5% on average in the period. The largest contribution to growth came from the higher prices of oil derivatives. Service prices increased 0.6% in August on the back of a price increase in public utility service prices. The cost of living increased 0.2% in August and 6% for 9M09.