Variable costs are
a. the same as sunk costs
b. irrelevant to decision making, because they are sunk
c. the costs of inputs that vary with the level of production
d. the costs of inputs that do not vary with the level of production
e. the additional total cost associated with producing an additional unit of output
C
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When demand is unit elastic, a change in price causes total revenue to stay the same because
A) the change in profit is offset by the change in production cost. B) buyers are buying the same quantity. C) total revenue never changes with price changes. D) the percentage change in quantity demanded exactly offsets the percentage change in price.
In a fixed exchange rate system
A) market forces and the country's stock of gold determine its exchange rate. B) a central bank affects the value of a currency by changing its foreign exchange reserves. C) market forces play a role in determining the fixed value of a currency. D) the International Monetary Fund determines exchange rates.