21. On October 1, Benjis Bicycle Store had an inventory of 20 bicycles at a cost of $200 each. During the month of October, the following transactions occurred.

Oct. 4 Purchased 40 bicycles on account at a cost of $200 each from Monroe Bicycle Company, terms 1/10, n/30.

6 Sold 25 bicycles to Team Wisconsin on account for $330 each, terms 2/10, n/30. The bicycles cost $200 each.

7 Received $400 credit from Monroe Bicycle Company for the return of 2 defective bicycles.

13 Granted $330 credit to Team Wisconsin for the return of a defective bicycle costing $200.

14 Paid Monroe Bicycle Company in full, less discount.

Prepare the journal entries to record the transactions listed above for Benjis Bicycle Store assuming it uses a perpetual inventory system.