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.
Graphically, producer surplus is the shaded region just above the supply curve, but below the equilibrium price level. Key Terms. producer surplus: The amount that producers benefit by selling at a market price that is higher than the lowest price at which they would be willing to sell. Producer surplus is the difference between what price producers are willing and able to supply a good for and what price they actually receive from consumers. It is the extra money, benefit, and/or utility producers get from selling a product at a price that is higher than their minimum accepted price, as shown by the supply curve.