1.During its first year of operations, Maine Corporation made the following inventory purchases and sales.

Date

Units Purchased/(Sold)

Cost Per Unit

Inventory Balance

(in units)

April 3

5,000

$4.25

5,000

April 10

2,000

$4.00

7,000

April 16

(4,000)

3,000

April 20

5,000

$4.50

8,000

April 25

2,000

$4.75

10,000

Calculate ending inventory and cost of goods sold using the 1) FIFO method under a periodic inventory system 2) FIFO method under a perpetual inventory system 3) LIFO method under a periodic inventory system and 4) LIFO method under a perpetual inventory system.