Maas, Inc., sells washers and dryers that include a maximum one-year warranty covering parts. Past experience shows that warranty expense averages about 2 percent of the selling price of each washer and dryer. Net sales totaled $400,000 during the year ending December 31. Prepare the December 31 adjusting entry for Maas by selecting the account names from the drop-down menus and entering the dollar amounts in the debit or credit columns.