On January 1, Aguero Inc. had a beginning inventory of 960 units of soccer balls at a cost of $6 per unit. During the year, inventory purchases were as follows: PURCHASE DATE UNITS UNIT COST February 20 2350 $5 May 5 2800 6 August 15 2480 6.5 December 8 1760 5 The company uses a periodic inventory system. At the end of the year on December 31, a physical inventory count determined that there were 2240 units on hand