9000 or 8500? please help asap!!

Allowance for Doubtful Accounts has a credit balance of $500 at the end of the year (before adfustment), and bad debt expense is estimated at 3\% of crecit sales. If credit sales are $300,000, the amount of the adjusting entry to journalize the estimated uncollectible accounts receivable is a. $9,500 b. $5.500 c. cannot determitoe wihour anore infermation d. 59,90 100,0003%300,0003%500=3,000=9,000=8,500