1 You can only upload photos smaller than 5 MB. 2  You can only upload videos smaller than 600MB.  You can only upload a photo (png, jpg, jpeg) or a video (3gp, 3gpp, mp4, mov, avi, mpg, mpeg, rm).
The price to exchange one U.S. dollar for one unit of a foreign currency is called an exchange rate. The exchange rate of the U.S. dollar varies for different foreign currencies, which fluctuate daily based on a number of factors.
A change in a country's balance of payments can cause fluctuations in the exchange rate between its currency and foreign currencies. The reverse is also true where a fluctuation in relative currency strength can alter the balance of payments. There are two different and interrelated markets at work: the market for all financial transactions on the international market (balance of payments) and the supply and demand for a specific currency (exchange rate).