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.
BALANCE OF TRADE. The balance of trade of a nation is the difference between values of its exports and imports. When exports are greater than imports, the nation is said to have a balance of trade surplus. On the other hand, if imports are greater than exports, the nation is said to have a balance of trade deficit. Exports and imports that figure in the balance of trade concept arise in the context of trade with other countries.