If real GDP is $800 million and aggregate labor hours are 20 million, labor productivity is ________

As the value of U.S. exports ________, the quantity of ________ demanded increases

A) increases; foreign currencies B) increases; dollars C) decreases; dollars D) None of the above is correct because the value of U.S. exports has nothing to do with the quantity of dollars or foreign currency demanded.

In the short run, a perfectly competitive firm can

A) only make an economic profit. B) only make zero economic profit. C) only incur an economic loss. D) make an economic profit, zero economic profit, or incur an economic loss.