Oxnard Corporation reported the following information for the month of November 200X, regarding its Product X:

Purchases Unit Total

Date (Units) Cost Cost

November 1, 200X Beginning Inventory 200 $50 $10,000

November 15 Purchase 600 $60 36,000

November 23 Sold 500 units.

November 25 Purchase 400 $70 28,000

November 27 Sold 600 units.

November 28 Purchase 220 $75 16,500

Goods available for sale 1420 $90,500

Required: Compute the cost of goods sold using the FIFO, LIFO, and average cost methods, assuming that the company uses a perpetual inventory system.