a. Prepare the journal entries to record sales and cost of goods sold for the current year. Assume all sales are on account and cost of goods sold is 40% of the selling price. b. Prepare the journal entries to record actual returns during the current year. Include the cost of goods sold entry. c. Prepare the adjusting entries related to estimated returns on December 31. Include the cost of goods sold entry. Note: If a line in a journal entry isn't required for the transaction, select "N/A" as the account name and leave the Dr. and Cr. answers blank (zero)