Refer to Figure 34.4. The breakeven level of income in this example is

All of the following are market determinants of exchange rates EXCEPT

A) changes in productivity in one country relative to another. B) changes in real interest rates in one country relative to another. C) changes in product preferences between countries. D) changes in the relative prices of goods and services within a country.

If the demand for ptyalin is unit elastic, then

a. total revenue decreases as quantity demanded increases b. total revenue increases as quantity demanded increases c. total revenue increases as price increases d. total revenue remains constant as price increases e. total revenue decreases as price increases