1 An oil change typically costs $20-$55, depending on whether the work is performed at an independent shop, an oil-change retail chain or a dealership, and the number of quarts of oil used in the vehicle. Oil changes involve more parts than just the oil itself. 2  Included in the cost of any oil change is the cost of labor, the oil, shop supplies, an oil filter and any associated gasket, O-rings or seals, plus the cost of disposing of the used oil. 3  Labor is not charged in the same way that is for other repair jobs.
Trade surplus is defined as that a nation is exporting more than it imports, giving it an inflow of currency. An example of trade surplus is that China is exporting more goods than China imports from other countries. YourDictionary definition and usage example.
Trade Surplus. The difference between the value of a country's exports and the value of its imports, where the value of exports is greater. Analysts disagree on the impact, if any, of a trade surplus on the economy. Some economists believe that a trade surplus creates employment and increases GDP growth.