Dynamic, Inc. had credit sales of $645,000 for March. Accounts receivable of $12,000 were determined to be worthless and were written off during March. Accounts receivable total $542.000 at March 31. Management feels that based on past experience, approximately 1% of net credit sales will prove to be uncollectible. value: 5.00 points Assuming Dynamic, Inc. uses the income statement approach (an allowance method) to account for uncollectible accounts, uncollectible accounts expense for March is: $5,420. O $17.420. O O $18.450. $6,450