Leigh of New York sells its products to customers in the United States and the United Kingdom. On December 16, 2009, Leigh sold merchandise on credit to Berton Ltd. of London at a price of 20,000 pounds. The exchange rate on that day for £1 was $2.0325. On December 31, 2009, when Leigh prepared its financial statements, the rate was £1 for $2.0292. Berton paid its bill in full on January 15, 2010, at which time the exchange rate was £1 for $2.0340. Leigh immediately exchanged the 20,000 pounds for U.S. dollars. Prepare Leigh's journal entries on December 16, December 31, and January 15.