3 Trekking Company had the following purchases during the year: January 1: 10 units at $120 May 1: 15 units at $140 November 1: 10 units at $160 On December 31, there were 15 units in ending inventory. These 15 units consisted of 5 from January, 5 from May, and 5 from November. Using the specific identification method, the cost of the ending inventory is