This relates to question 1 on page 230. Assuming constant mark-ups, the export sales will: probably decline if the dollar depreciates by 20% because US exports will become cheaper to foreigners. probably increase if the dollar depreciates by 20% because US exports will become cheaper to foreigners. probably decline if the dollar depreciates by 20% because US exports will become more expensive to foreigners. probably increase if the dollar depreciates by 20% because foreigners will have less income