Many bars close to campuses have started offering cheaper beer to consumers with a student IDs. These bars are using

Foreign exchange means

a. changing dollars into foreign currency b. domestic currency held to finance international trade c. foreign currency d. trade between governments e. trade between individuals in different countries

At the profit-maximizing level of output,

a. marginal revenue equals average total cost. b. marginal revenue equals average variable cost. c. marginal revenue equals marginal cost. d. average revenue equals average total cost.