On December 1, Sheffield Company introduces a new product that includes a one-year warranty n parts. In December 2,000 units are sold. Management believes that 4% of the units will bc defective and that the average warranty costs will bo $90 per unit. Prepare the adjusting entry at December 31 to accrue the estimated warranty cost, assuming no warranty claims have been honored to date. (Credit account titles are automatically indented when amount is entered. Do not indent manually.) Date Account Titles and Explanation Debit Credit Dec. 31