The following are selected transactions and other data of the Custer Company:
Purchased 20 units at USD 360 per unit on account on 2010 September 18.
Sold 6 units on account for USD 576 per unit on 2010 September 20.
Discovered a shortage of USD 2,640 at year-end after a physical inventory.
Prepare journal entries for these transactions using FIFO perpetual inventory procedure. Assume the beginning inventory consists of 20 units at USD 336 per unit.