Multinational corporations seek to source inputs and locate production where costs are lower and profits higher, allowing them to take advantage of economic differences between countries. However, this can also disadvantage some domestic industries and workers in higher cost countries. Currency depreciation in international trade can make exports cheaper and imports more expensive, improving the trade balance but also risking inflation from more expensive imports. In the pre-1870s international monetary system, the exchange rate between the U.S. dollar and German mark would be $30 per mark, as the dollar was pegged to gold at $30 per ounce and the mark was pegged to silver at 1 mark per ounce with silver valued at the same rate as gold.