On December 20, 2020, Momeier Company (a U.S.-based company) sold parts to a foreign customer at a price of 50,000 rials. Payment is received on January 10, 2021. Currency exchange rates are as follows: U.S. Dollar Date December 20, 2020 December 31, 2020 January 10, 2021 per Rial $ 1.05 1.02 0.98 a. How does the fluctuation in the U.S. dollar per rial exchange rate affect Momeier's 2020 income statement? b. How does the fluctuation in the U.S. dollar per rial exchange rate affect Momeier's 2021 income statement? a. The rial receivable exchange decreases in U.S. dollar value, resulting in a foreign gain of in 2020. b. The rial receivable increases in U.S. dollar value, resulting in a foreign exchange gain of in 2021