Our net income is significantly affected by changes in the margins on retail and wholesale gasoline marketing operations. Oil and domestic wholesale gasoline markets are volatile. General political conditions, acts of war or terrorism and instability in oil producing regions, particularly in the Middle East and South America, and the value of U.S. dollars relative to other foreign currencies, particularly those of oil producing nations, have significantly affected and in the future could significantly affect oil supplies and wholesale gasoline costs. In addition, the supply of gasoline and our wholesale purchase costs can be adversely affected in the event of a shortage, which could result from, among other things, lack of capacity at oil refineries, sustained increase in global demand or the fact that our gasoline contracts do not guarantee an uninterrupted, unlimited supply of gasoline. Our wholesale purchase costs could also be adversely affected by increasingly stringent regulations regarding the content and characteristics of fuel products. Significant increases and volatility in wholesale gasoline costs could result in lower gasoline gross margins per gallon. This volatility makes it extremely difficult to predict the effect that future wholesale cost fluctuations will have on our operating results and financial condition in future periods.
Except in limited cases, we typically do not seek to hedge any significant portion of our exposure to the effects of changing prices of commodities. Dramatic increases in oil prices reduce retail gasoline gross margins, because wholesale gasoline costs typically increase faster than retailers are able to pass them along to customers. We purchase refined products, particularly gasoline, needed to supply our retail stores. Therefore, our most significant costs are subject to volatility of prices for these commodities. Our ability to successfully manage operating costs is important because we have little or no influence on the sales prices or regional and worldwide consumer demand for oil and gasoline. Furthermore, oil prices, wholesale fuel costs, fuel sales volumes, fuel gross margins and merchandise sales can be subject to seasonal fluctuations. For example, consumer demand for fuel typically increases during the summer driving season, and typically falls during the winter months. Travel, recreation and construction are typically higher in these months in the geographic areas in which we operate, increasing the demand for fuel and merchandise that we sell. Therefore, our revenues and/or sales volumes are typically higher in the second and third quarters of our fiscal year. A significant change in any of these factors, including a significant decrease in consumer demand (other than typical seasonal variations), could materially affect our fuel and merchandise volumes, fuel gross profit and overall customer traffic, which in turn could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Further, recessionary economic conditions, higher interest rates, higher gasoline and other energy costs, inflation, increases in commodity prices, higher levels of unemployment, higher consumer debt levels, higher tax rates and other changes in tax laws or other economic factors may affect consumer spending or buying habits, and could adversely affect the demand for products we sell at our retail stores. Unfavorable economic conditions, higher gasoline prices and unemployment levels can affect consumer confidence, spending patterns and vehicle miles driven. These factors can lead to sales declines in both gasoline and general merchandise, and in turn have an adverse impact on our business, financial condition, results of operations and cash flows.