The beginning inventory was 600 units at a cost of $20 per unit. Goods available for sale during the year were 2,600 units at a total cost of $57,600. In May, 1,200 units were purchased at a total cost of $26,400. The only other purchase transaction occurred during October. Ending inventory was 1,100 units.

Required:

a. Calculate the number of units purchased in October and the cost per unit purchased in October.

b-1. Assume the periodic inventory system is used. Calculate cost of goods sold and ending inventory using FIFO method.

b-2. Assume the periodic inventory system is used. Calculate cost of goods sold and ending inventory using LIFO method.

Purchased in October Number of units Cost per unit