Please solve quickly, time is short

Assume that you have been hired to work as an accountant in Walmart at 1/12/2020 and you found that the account receivable has a balance of 80000 and allowance for doubtful accounts 8000 and you have the following transaction that happened at Walmart during the month:

1- At 1/12 Sold goods on account to CVS, Inc. for $18,000, terms 2/10, n/30 but some of these goods did not meet the quality requirement and goods worth 3000 was returned on 3/12.

2- At 5/12 you billed a customer who used his Walmart credit card (to purchase goods worth 15000 on 4/11 but didnt pay the balance) finance charge 3%.

3- At 11/12 CVS paid what it owns to Walmart in full.

4- At 15/12 the manager at Walmart estimated the bad debts to be 12% of account receivables.

5- At 20/12 the manager wrote of 654 of bad debts.

6- At 31/12 you were hired by the manager to be a custodian of the previously issued petty cash fund which worth 200 and you submitted the following cash receipts for replenishment when there is $47 cash in the fund: Freight-Out 27, Supplies Expense 35, Entertainment 60 and Postage Expense 28.

You are required to journalize all necessary entries for the month of December.