Shown below is activity for one of the products of Denver Office Equipment:

January 1 balance, 500 units @ $55 $27,500
Purchases January 10 500 units @ $60
January 20 1,000 units @ $63
Sales:
January 12 800 units
January 28 750 units

a. Compute the ending inventory and cost of goods sold assuming Denver uses FIFO.
b. Compute the ending inventory and cost of goods sold assuming Denver uses LIFO and a perpetual inventory system.
c. Compute the ending inventory and cost of goods sold assuming Denver uses average cost and a periodic inventory system.
d. Compute the ending inventory and cost of goods sold assuming Denver uses average cost and a perpetual inventory system.
e. Compute the ending inventory and cost of goods sold assuming Denver uses LIFO and a periodic inventory system.