Autumn Company began the month of October with inventory of $15,000. The following inventory transactions occurred during the month:
a. The company purchased inventory on account for $22,000 on October 12. Terms of the purchase were 2/10, n/30. Autumn uses the net method to record purchases. The inventory was shipped f.o.b. shipping point and freight charges of $500 were paid in cash.
b. On October 31, Autumn paid for the inventory purchased on October 12.
c. During October inventory costing $18,000 was sold on account for $28,000.
d. It was determined that inventory on hand at the end of October cost $19,060.

Required:
1. Assuming Autumn Company uses a perpetual inventory system, prepare journal entries for the above transactions.
2. Assuming Autumn Company uses a periodic inventory system, prepare journal entries for the above transactions including the adjusting entry at the end of October to record cost of goods sold. Autumn considers purchase discounts lost as part of interest expense.