Battle Tank, Inc. had net sales in 2008 of $1,200,000. At December 31, 2008, before adjusting entries, the balances in selected accounts were: Accounts Receivable $250,000 debit, and Allowance for Doubtful Accounts $2,100 credit. If Battle Tank estimates that 2% of its net sales will prove to be uncollectible, prepare the December 31, 2008, journal entry to record bad debt expense.